1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23dab291afSMingming Cao #include <linux/jbd2.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 371330593eSVignesh Babu #include <linux/log2.h> 38717d50e4SAndreas Dilger #include <linux/crc16.h> 39ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 40ac27a0ecSDave Kleikamp 413dcf5451SChristoph Hellwig #include "ext4.h" 423dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 43ac27a0ecSDave Kleikamp #include "xattr.h" 44ac27a0ecSDave Kleikamp #include "acl.h" 45ac27a0ecSDave Kleikamp #include "namei.h" 46717d50e4SAndreas Dilger #include "group.h" 47ac27a0ecSDave Kleikamp 48617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 49ac27a0ecSDave Kleikamp unsigned long journal_devnum); 50617ba13bSMingming Cao static int ext4_create_journal(struct super_block *, struct ext4_super_block *, 51ac27a0ecSDave Kleikamp unsigned int); 52617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 53617ba13bSMingming Cao struct ext4_super_block * es, 54ac27a0ecSDave Kleikamp int sync); 55617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 56617ba13bSMingming Cao struct ext4_super_block * es); 57617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 58617ba13bSMingming Cao struct ext4_super_block * es); 59617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 60617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 61ac27a0ecSDave Kleikamp char nbuf[16]); 62617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data); 63617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); 64617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb); 65617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb); 66617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb); 67ac27a0ecSDave Kleikamp 68bd81d8eeSLaurent Vivier 698fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 708fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 71bd81d8eeSLaurent Vivier { 723a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 738fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 748fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 75bd81d8eeSLaurent Vivier } 76bd81d8eeSLaurent Vivier 778fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 788fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 79bd81d8eeSLaurent Vivier { 805272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 818fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 828fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 83bd81d8eeSLaurent Vivier } 84bd81d8eeSLaurent Vivier 858fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 868fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 87bd81d8eeSLaurent Vivier { 885272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 898fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 908fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 91bd81d8eeSLaurent Vivier } 92bd81d8eeSLaurent Vivier 938fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 948fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 95bd81d8eeSLaurent Vivier { 963a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 978fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 988fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 99bd81d8eeSLaurent Vivier } 100bd81d8eeSLaurent Vivier 1018fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1028fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 103bd81d8eeSLaurent Vivier { 1045272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1058fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1068fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 107bd81d8eeSLaurent Vivier } 108bd81d8eeSLaurent Vivier 1098fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1108fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 111bd81d8eeSLaurent Vivier { 1125272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1138fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1148fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 115bd81d8eeSLaurent Vivier } 116bd81d8eeSLaurent Vivier 117ac27a0ecSDave Kleikamp /* 118dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 119ac27a0ecSDave Kleikamp * 120ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 121ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 122ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 123ac27a0ecSDave Kleikamp * appropriate. 124ac27a0ecSDave Kleikamp */ 125617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 126ac27a0ecSDave Kleikamp { 127ac27a0ecSDave Kleikamp journal_t *journal; 128ac27a0ecSDave Kleikamp 129ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 130ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 131ac27a0ecSDave Kleikamp 132ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 133ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 134ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 135617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 136ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 13746e665e9SHarvey Harrison ext4_abort(sb, __func__, 138ac27a0ecSDave Kleikamp "Detected aborted journal"); 139ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 140ac27a0ecSDave Kleikamp } 141ac27a0ecSDave Kleikamp 142dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 143ac27a0ecSDave Kleikamp } 144ac27a0ecSDave Kleikamp 145ac27a0ecSDave Kleikamp /* 146ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 147dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 148ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 149ac27a0ecSDave Kleikamp * appropriate. 150ac27a0ecSDave Kleikamp */ 151617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 152ac27a0ecSDave Kleikamp { 153ac27a0ecSDave Kleikamp struct super_block *sb; 154ac27a0ecSDave Kleikamp int err; 155ac27a0ecSDave Kleikamp int rc; 156ac27a0ecSDave Kleikamp 157ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 158ac27a0ecSDave Kleikamp err = handle->h_err; 159dab291afSMingming Cao rc = jbd2_journal_stop(handle); 160ac27a0ecSDave Kleikamp 161ac27a0ecSDave Kleikamp if (!err) 162ac27a0ecSDave Kleikamp err = rc; 163ac27a0ecSDave Kleikamp if (err) 164617ba13bSMingming Cao __ext4_std_error(sb, where, err); 165ac27a0ecSDave Kleikamp return err; 166ac27a0ecSDave Kleikamp } 167ac27a0ecSDave Kleikamp 168617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 169ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 170ac27a0ecSDave Kleikamp { 171ac27a0ecSDave Kleikamp char nbuf[16]; 172617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 173ac27a0ecSDave Kleikamp 174ac27a0ecSDave Kleikamp if (bh) 175ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 176ac27a0ecSDave Kleikamp 177ac27a0ecSDave Kleikamp if (!handle->h_err) 178ac27a0ecSDave Kleikamp handle->h_err = err; 179ac27a0ecSDave Kleikamp 180ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 181ac27a0ecSDave Kleikamp return; 182ac27a0ecSDave Kleikamp 183ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 184ac27a0ecSDave Kleikamp caller, errstr, err_fn); 185ac27a0ecSDave Kleikamp 186dab291afSMingming Cao jbd2_journal_abort_handle(handle); 187ac27a0ecSDave Kleikamp } 188ac27a0ecSDave Kleikamp 189ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 190ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 191ac27a0ecSDave Kleikamp * 192ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 193617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 194ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 195ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 196ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 197ac27a0ecSDave Kleikamp * write out the superblock safely. 198ac27a0ecSDave Kleikamp * 199dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 200ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 201ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 202ac27a0ecSDave Kleikamp */ 203ac27a0ecSDave Kleikamp 204617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 205ac27a0ecSDave Kleikamp { 206617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 207ac27a0ecSDave Kleikamp 208617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 209617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 210ac27a0ecSDave Kleikamp 211ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 212ac27a0ecSDave Kleikamp return; 213ac27a0ecSDave Kleikamp 214ac27a0ecSDave Kleikamp if (!test_opt (sb, ERRORS_CONT)) { 215617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 216ac27a0ecSDave Kleikamp 217617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 218ac27a0ecSDave Kleikamp if (journal) 219dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 220ac27a0ecSDave Kleikamp } 221ac27a0ecSDave Kleikamp if (test_opt (sb, ERRORS_RO)) { 222ac27a0ecSDave Kleikamp printk (KERN_CRIT "Remounting filesystem read-only\n"); 223ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 224ac27a0ecSDave Kleikamp } 225617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 226ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 227617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 228ac27a0ecSDave Kleikamp sb->s_id); 229ac27a0ecSDave Kleikamp } 230ac27a0ecSDave Kleikamp 231617ba13bSMingming Cao void ext4_error (struct super_block * sb, const char * function, 232ac27a0ecSDave Kleikamp const char * fmt, ...) 233ac27a0ecSDave Kleikamp { 234ac27a0ecSDave Kleikamp va_list args; 235ac27a0ecSDave Kleikamp 236ac27a0ecSDave Kleikamp va_start(args, fmt); 237617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 238ac27a0ecSDave Kleikamp vprintk(fmt, args); 239ac27a0ecSDave Kleikamp printk("\n"); 240ac27a0ecSDave Kleikamp va_end(args); 241ac27a0ecSDave Kleikamp 242617ba13bSMingming Cao ext4_handle_error(sb); 243ac27a0ecSDave Kleikamp } 244ac27a0ecSDave Kleikamp 245617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 246ac27a0ecSDave Kleikamp char nbuf[16]) 247ac27a0ecSDave Kleikamp { 248ac27a0ecSDave Kleikamp char *errstr = NULL; 249ac27a0ecSDave Kleikamp 250ac27a0ecSDave Kleikamp switch (errno) { 251ac27a0ecSDave Kleikamp case -EIO: 252ac27a0ecSDave Kleikamp errstr = "IO failure"; 253ac27a0ecSDave Kleikamp break; 254ac27a0ecSDave Kleikamp case -ENOMEM: 255ac27a0ecSDave Kleikamp errstr = "Out of memory"; 256ac27a0ecSDave Kleikamp break; 257ac27a0ecSDave Kleikamp case -EROFS: 258dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 259ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 260ac27a0ecSDave Kleikamp else 261ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 262ac27a0ecSDave Kleikamp break; 263ac27a0ecSDave Kleikamp default: 264ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 265ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 266ac27a0ecSDave Kleikamp * NULL. */ 267ac27a0ecSDave Kleikamp if (nbuf) { 268ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 269ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 270ac27a0ecSDave Kleikamp errstr = nbuf; 271ac27a0ecSDave Kleikamp } 272ac27a0ecSDave Kleikamp break; 273ac27a0ecSDave Kleikamp } 274ac27a0ecSDave Kleikamp 275ac27a0ecSDave Kleikamp return errstr; 276ac27a0ecSDave Kleikamp } 277ac27a0ecSDave Kleikamp 278617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 279ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 280ac27a0ecSDave Kleikamp 281617ba13bSMingming Cao void __ext4_std_error (struct super_block * sb, const char * function, 282ac27a0ecSDave Kleikamp int errno) 283ac27a0ecSDave Kleikamp { 284ac27a0ecSDave Kleikamp char nbuf[16]; 285ac27a0ecSDave Kleikamp const char *errstr; 286ac27a0ecSDave Kleikamp 287ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 288ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 289ac27a0ecSDave Kleikamp * an error. */ 290ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 291ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 292ac27a0ecSDave Kleikamp return; 293ac27a0ecSDave Kleikamp 294617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 295617ba13bSMingming Cao printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 296ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 297ac27a0ecSDave Kleikamp 298617ba13bSMingming Cao ext4_handle_error(sb); 299ac27a0ecSDave Kleikamp } 300ac27a0ecSDave Kleikamp 301ac27a0ecSDave Kleikamp /* 302617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 303ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 304ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 305ac27a0ecSDave Kleikamp * 306ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 307ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 308ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 309ac27a0ecSDave Kleikamp */ 310ac27a0ecSDave Kleikamp 311617ba13bSMingming Cao void ext4_abort (struct super_block * sb, const char * function, 312ac27a0ecSDave Kleikamp const char * fmt, ...) 313ac27a0ecSDave Kleikamp { 314ac27a0ecSDave Kleikamp va_list args; 315ac27a0ecSDave Kleikamp 316617ba13bSMingming Cao printk (KERN_CRIT "ext4_abort called.\n"); 317ac27a0ecSDave Kleikamp 318ac27a0ecSDave Kleikamp va_start(args, fmt); 319617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 320ac27a0ecSDave Kleikamp vprintk(fmt, args); 321ac27a0ecSDave Kleikamp printk("\n"); 322ac27a0ecSDave Kleikamp va_end(args); 323ac27a0ecSDave Kleikamp 324ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 325617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 326ac27a0ecSDave Kleikamp 327ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 328ac27a0ecSDave Kleikamp return; 329ac27a0ecSDave Kleikamp 330ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 331617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 332ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 333617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 334dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 335ac27a0ecSDave Kleikamp } 336ac27a0ecSDave Kleikamp 337617ba13bSMingming Cao void ext4_warning (struct super_block * sb, const char * function, 338ac27a0ecSDave Kleikamp const char * fmt, ...) 339ac27a0ecSDave Kleikamp { 340ac27a0ecSDave Kleikamp va_list args; 341ac27a0ecSDave Kleikamp 342ac27a0ecSDave Kleikamp va_start(args, fmt); 343617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 344ac27a0ecSDave Kleikamp sb->s_id, function); 345ac27a0ecSDave Kleikamp vprintk(fmt, args); 346ac27a0ecSDave Kleikamp printk("\n"); 347ac27a0ecSDave Kleikamp va_end(args); 348ac27a0ecSDave Kleikamp } 349ac27a0ecSDave Kleikamp 350617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 351ac27a0ecSDave Kleikamp { 352617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 353ac27a0ecSDave Kleikamp 354617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 355ac27a0ecSDave Kleikamp return; 356ac27a0ecSDave Kleikamp 35746e665e9SHarvey Harrison ext4_warning(sb, __func__, 358ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 359ac27a0ecSDave Kleikamp "running e2fsck is recommended", 360617ba13bSMingming Cao EXT4_DYNAMIC_REV); 361ac27a0ecSDave Kleikamp 362617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 363617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 364617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 365ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 366ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 367ac27a0ecSDave Kleikamp 368ac27a0ecSDave Kleikamp /* 369ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 370ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 371ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 372ac27a0ecSDave Kleikamp */ 373ac27a0ecSDave Kleikamp } 374ac27a0ecSDave Kleikamp 37599e6f829SAneesh Kumar K.V int ext4_update_compat_feature(handle_t *handle, 37699e6f829SAneesh Kumar K.V struct super_block *sb, __u32 compat) 37799e6f829SAneesh Kumar K.V { 37899e6f829SAneesh Kumar K.V int err = 0; 37999e6f829SAneesh Kumar K.V if (!EXT4_HAS_COMPAT_FEATURE(sb, compat)) { 38099e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 38199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 38299e6f829SAneesh Kumar K.V if (err) 38399e6f829SAneesh Kumar K.V return err; 38499e6f829SAneesh Kumar K.V EXT4_SET_COMPAT_FEATURE(sb, compat); 38599e6f829SAneesh Kumar K.V sb->s_dirt = 1; 38699e6f829SAneesh Kumar K.V handle->h_sync = 1; 38799e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 38899e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 38999e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 39099e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 39199e6f829SAneesh Kumar K.V } 39299e6f829SAneesh Kumar K.V return err; 39399e6f829SAneesh Kumar K.V } 39499e6f829SAneesh Kumar K.V 39599e6f829SAneesh Kumar K.V int ext4_update_rocompat_feature(handle_t *handle, 39699e6f829SAneesh Kumar K.V struct super_block *sb, __u32 rocompat) 39799e6f829SAneesh Kumar K.V { 39899e6f829SAneesh Kumar K.V int err = 0; 39999e6f829SAneesh Kumar K.V if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, rocompat)) { 40099e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 40199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 40299e6f829SAneesh Kumar K.V if (err) 40399e6f829SAneesh Kumar K.V return err; 40499e6f829SAneesh Kumar K.V EXT4_SET_RO_COMPAT_FEATURE(sb, rocompat); 40599e6f829SAneesh Kumar K.V sb->s_dirt = 1; 40699e6f829SAneesh Kumar K.V handle->h_sync = 1; 40799e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 40899e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 40999e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 41099e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 41199e6f829SAneesh Kumar K.V } 41299e6f829SAneesh Kumar K.V return err; 41399e6f829SAneesh Kumar K.V } 41499e6f829SAneesh Kumar K.V 41599e6f829SAneesh Kumar K.V int ext4_update_incompat_feature(handle_t *handle, 41699e6f829SAneesh Kumar K.V struct super_block *sb, __u32 incompat) 41799e6f829SAneesh Kumar K.V { 41899e6f829SAneesh Kumar K.V int err = 0; 41999e6f829SAneesh Kumar K.V if (!EXT4_HAS_INCOMPAT_FEATURE(sb, incompat)) { 42099e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 42199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 42299e6f829SAneesh Kumar K.V if (err) 42399e6f829SAneesh Kumar K.V return err; 42499e6f829SAneesh Kumar K.V EXT4_SET_INCOMPAT_FEATURE(sb, incompat); 42599e6f829SAneesh Kumar K.V sb->s_dirt = 1; 42699e6f829SAneesh Kumar K.V handle->h_sync = 1; 42799e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 42899e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 42999e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 43099e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 43199e6f829SAneesh Kumar K.V } 43299e6f829SAneesh Kumar K.V return err; 43399e6f829SAneesh Kumar K.V } 43499e6f829SAneesh Kumar K.V 435ac27a0ecSDave Kleikamp /* 436ac27a0ecSDave Kleikamp * Open the external journal device 437ac27a0ecSDave Kleikamp */ 438617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 439ac27a0ecSDave Kleikamp { 440ac27a0ecSDave Kleikamp struct block_device *bdev; 441ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 442ac27a0ecSDave Kleikamp 443ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 444ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 445ac27a0ecSDave Kleikamp goto fail; 446ac27a0ecSDave Kleikamp return bdev; 447ac27a0ecSDave Kleikamp 448ac27a0ecSDave Kleikamp fail: 449617ba13bSMingming Cao printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", 450ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 451ac27a0ecSDave Kleikamp return NULL; 452ac27a0ecSDave Kleikamp } 453ac27a0ecSDave Kleikamp 454ac27a0ecSDave Kleikamp /* 455ac27a0ecSDave Kleikamp * Release the journal device 456ac27a0ecSDave Kleikamp */ 457617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 458ac27a0ecSDave Kleikamp { 459ac27a0ecSDave Kleikamp bd_release(bdev); 460ac27a0ecSDave Kleikamp return blkdev_put(bdev); 461ac27a0ecSDave Kleikamp } 462ac27a0ecSDave Kleikamp 463617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 464ac27a0ecSDave Kleikamp { 465ac27a0ecSDave Kleikamp struct block_device *bdev; 466ac27a0ecSDave Kleikamp int ret = -ENODEV; 467ac27a0ecSDave Kleikamp 468ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 469ac27a0ecSDave Kleikamp if (bdev) { 470617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 471ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 472ac27a0ecSDave Kleikamp } 473ac27a0ecSDave Kleikamp return ret; 474ac27a0ecSDave Kleikamp } 475ac27a0ecSDave Kleikamp 476ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 477ac27a0ecSDave Kleikamp { 478617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 479ac27a0ecSDave Kleikamp } 480ac27a0ecSDave Kleikamp 481617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 482ac27a0ecSDave Kleikamp { 483ac27a0ecSDave Kleikamp struct list_head *l; 484ac27a0ecSDave Kleikamp 485ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 486ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 487ac27a0ecSDave Kleikamp 488ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 489ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 490ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 491ac27a0ecSDave Kleikamp printk(KERN_ERR " " 492ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 493ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 494ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 495ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 496ac27a0ecSDave Kleikamp } 497ac27a0ecSDave Kleikamp } 498ac27a0ecSDave Kleikamp 499617ba13bSMingming Cao static void ext4_put_super (struct super_block * sb) 500ac27a0ecSDave Kleikamp { 501617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 502617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 503ac27a0ecSDave Kleikamp int i; 504ac27a0ecSDave Kleikamp 505c9de560dSAlex Tomas ext4_mb_release(sb); 506a86c6181SAlex Tomas ext4_ext_release(sb); 507617ba13bSMingming Cao ext4_xattr_put_super(sb); 508dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 50947b4a50bSJan Kara sbi->s_journal = NULL; 510ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 511617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 512ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 513ac27a0ecSDave Kleikamp BUFFER_TRACE(sbi->s_sbh, "marking dirty"); 514ac27a0ecSDave Kleikamp mark_buffer_dirty(sbi->s_sbh); 515617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 516ac27a0ecSDave Kleikamp } 517ac27a0ecSDave Kleikamp 518ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 519ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 520ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 521772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 522ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 523ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 524ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 525ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 526ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 527ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 528ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 529ac27a0ecSDave Kleikamp #endif 530ac27a0ecSDave Kleikamp 531ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 532ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 533ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 534ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 535ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 536ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 537ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 538ac27a0ecSDave Kleikamp 539f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 540ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 541ac27a0ecSDave Kleikamp /* 542ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 543ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 544ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 545ac27a0ecSDave Kleikamp */ 546ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 547f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 548617ba13bSMingming Cao ext4_blkdev_remove(sbi); 549ac27a0ecSDave Kleikamp } 550ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 551ac27a0ecSDave Kleikamp kfree(sbi); 552ac27a0ecSDave Kleikamp return; 553ac27a0ecSDave Kleikamp } 554ac27a0ecSDave Kleikamp 555e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 556ac27a0ecSDave Kleikamp 557ac27a0ecSDave Kleikamp /* 558ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 559ac27a0ecSDave Kleikamp */ 560617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 561ac27a0ecSDave Kleikamp { 562617ba13bSMingming Cao struct ext4_inode_info *ei; 563ac27a0ecSDave Kleikamp 564e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 565ac27a0ecSDave Kleikamp if (!ei) 566ac27a0ecSDave Kleikamp return NULL; 567617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 568617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 569617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 570ac27a0ecSDave Kleikamp #endif 571ac27a0ecSDave Kleikamp ei->i_block_alloc_info = NULL; 572ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 573a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 574c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 575c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 576678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 577*d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 578*d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 579*d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 580*d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 581*d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 582ac27a0ecSDave Kleikamp return &ei->vfs_inode; 583ac27a0ecSDave Kleikamp } 584ac27a0ecSDave Kleikamp 585617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 586ac27a0ecSDave Kleikamp { 5879f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 5889f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 5899f7dd93dSVasily Averin EXT4_I(inode)); 5909f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 5919f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 5929f7dd93dSVasily Averin true); 5939f7dd93dSVasily Averin dump_stack(); 5949f7dd93dSVasily Averin } 595617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 596ac27a0ecSDave Kleikamp } 597ac27a0ecSDave Kleikamp 5984ba9b9d0SChristoph Lameter static void init_once(struct kmem_cache *cachep, void *foo) 599ac27a0ecSDave Kleikamp { 600617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 601ac27a0ecSDave Kleikamp 602ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 603617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 604ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 605ac27a0ecSDave Kleikamp #endif 6060e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 607ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 608ac27a0ecSDave Kleikamp } 609ac27a0ecSDave Kleikamp 610ac27a0ecSDave Kleikamp static int init_inodecache(void) 611ac27a0ecSDave Kleikamp { 612617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 613617ba13bSMingming Cao sizeof(struct ext4_inode_info), 614ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 615ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 61620c2df83SPaul Mundt init_once); 617617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 618ac27a0ecSDave Kleikamp return -ENOMEM; 619ac27a0ecSDave Kleikamp return 0; 620ac27a0ecSDave Kleikamp } 621ac27a0ecSDave Kleikamp 622ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 623ac27a0ecSDave Kleikamp { 624617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 625ac27a0ecSDave Kleikamp } 626ac27a0ecSDave Kleikamp 627617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 628ac27a0ecSDave Kleikamp { 629617ba13bSMingming Cao struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; 630617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 631617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 632617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 633617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 634617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 635ac27a0ecSDave Kleikamp } 636617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 637617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 638617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 639617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 640ac27a0ecSDave Kleikamp } 641ac27a0ecSDave Kleikamp #endif 642617ba13bSMingming Cao ext4_discard_reservation(inode); 643617ba13bSMingming Cao EXT4_I(inode)->i_block_alloc_info = NULL; 644ac27a0ecSDave Kleikamp if (unlikely(rsv)) 645ac27a0ecSDave Kleikamp kfree(rsv); 646678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 647678aaf48SJan Kara &EXT4_I(inode)->jinode); 648ac27a0ecSDave Kleikamp } 649ac27a0ecSDave Kleikamp 650617ba13bSMingming Cao static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) 651ac27a0ecSDave Kleikamp { 652ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 653617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 654ac27a0ecSDave Kleikamp 655ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 656ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 657ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); 658ac27a0ecSDave Kleikamp 659ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 660ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 661ac27a0ecSDave Kleikamp 662ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 663ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 664ac27a0ecSDave Kleikamp 665617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 666ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 667ac27a0ecSDave Kleikamp 668617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 669ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 670ac27a0ecSDave Kleikamp #endif 671ac27a0ecSDave Kleikamp } 672ac27a0ecSDave Kleikamp 673d9c9bef1SMiklos Szeredi /* 674d9c9bef1SMiklos Szeredi * Show an option if 675d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 676d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 677d9c9bef1SMiklos Szeredi */ 678617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 679ac27a0ecSDave Kleikamp { 680aa22df2cSAneesh Kumar K.V int def_errors; 681aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 682ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 683d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 684d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 685d9c9bef1SMiklos Szeredi 686d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 687aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 688d9c9bef1SMiklos Szeredi 689d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 690d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 691d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 692d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 693aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 694d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 695d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 696d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 697d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 698d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 699d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 700d9c9bef1SMiklos Szeredi } 701d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 702d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 703d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 704d9c9bef1SMiklos Szeredi } 705bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 706d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 707bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 708d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 709bb4f397aSAneesh Kumar K.V } 710bb4f397aSAneesh Kumar K.V } 711aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 712bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 713aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 714d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 715aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 716d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 717aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 718d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 719d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 720d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 72107620f69SAdrian Bunk #ifdef CONFIG_EXT4DEV_FS_XATTR 722aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 723aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 724d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 725d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 726d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 727d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 728d9c9bef1SMiklos Szeredi } 729d9c9bef1SMiklos Szeredi #endif 73007620f69SAdrian Bunk #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 731aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 732d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 733d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 734d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 735d9c9bef1SMiklos Szeredi #endif 736d9c9bef1SMiklos Szeredi if (!test_opt(sb, RESERVATION)) 737d9c9bef1SMiklos Szeredi seq_puts(seq, ",noreservation"); 738d9c9bef1SMiklos Szeredi if (sbi->s_commit_interval) { 739d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 740d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 741d9c9bef1SMiklos Szeredi } 742571640caSEric Sandeen /* 743571640caSEric Sandeen * We're changing the default of barrier mount option, so 744571640caSEric Sandeen * let's always display its mount state so it's clear what its 745571640caSEric Sandeen * status is. 746571640caSEric Sandeen */ 747571640caSEric Sandeen seq_puts(seq, ",barrier="); 748571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 749cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 750cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 751d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 752d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 753d9c9bef1SMiklos Szeredi if (!test_opt(sb, EXTENTS)) 754d9c9bef1SMiklos Szeredi seq_puts(seq, ",noextents"); 7553dbd0edeSAneesh Kumar K.V if (!test_opt(sb, MBALLOC)) 7563dbd0edeSAneesh Kumar K.V seq_puts(seq, ",nomballoc"); 75725ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 75825ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 759ac27a0ecSDave Kleikamp 760cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 761cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 762aa22df2cSAneesh Kumar K.V /* 763aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 764aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 765aa22df2cSAneesh Kumar K.V */ 766617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 767ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 768617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 769ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 770617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 771ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 772ac27a0ecSDave Kleikamp 773617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 774ac27a0ecSDave Kleikamp return 0; 775ac27a0ecSDave Kleikamp } 776ac27a0ecSDave Kleikamp 777ac27a0ecSDave Kleikamp 7781b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 7791b961ac0SChristoph Hellwig u64 ino, u32 generation) 780ac27a0ecSDave Kleikamp { 781ac27a0ecSDave Kleikamp struct inode *inode; 782ac27a0ecSDave Kleikamp 783617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 784ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 785617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 786ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 787ac27a0ecSDave Kleikamp 788ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 789ac27a0ecSDave Kleikamp * 790617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 791ac27a0ecSDave Kleikamp * deleted, so we should be safe. 792ac27a0ecSDave Kleikamp * 793ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 794ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 795ac27a0ecSDave Kleikamp */ 7961d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 7971d1fe1eeSDavid Howells if (IS_ERR(inode)) 7981d1fe1eeSDavid Howells return ERR_CAST(inode); 7991d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 800ac27a0ecSDave Kleikamp iput(inode); 801ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 802ac27a0ecSDave Kleikamp } 8031b961ac0SChristoph Hellwig 8041b961ac0SChristoph Hellwig return inode; 805ac27a0ecSDave Kleikamp } 8061b961ac0SChristoph Hellwig 8071b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 8081b961ac0SChristoph Hellwig int fh_len, int fh_type) 8091b961ac0SChristoph Hellwig { 8101b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 8111b961ac0SChristoph Hellwig ext4_nfs_get_inode); 8121b961ac0SChristoph Hellwig } 8131b961ac0SChristoph Hellwig 8141b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 8151b961ac0SChristoph Hellwig int fh_len, int fh_type) 8161b961ac0SChristoph Hellwig { 8171b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 8181b961ac0SChristoph Hellwig ext4_nfs_get_inode); 819ac27a0ecSDave Kleikamp } 820ac27a0ecSDave Kleikamp 821ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 822ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 823ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 824ac27a0ecSDave Kleikamp 825617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 826617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 827617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 828617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 829617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 830617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 831617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 8326f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 8336f28e087SJan Kara char *path, int remount); 834617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 835617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 836ac27a0ecSDave Kleikamp size_t len, loff_t off); 837617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 838ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 839ac27a0ecSDave Kleikamp 840617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 841617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 842617ba13bSMingming Cao .drop = ext4_dquot_drop, 843ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 844ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 845ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 846ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 847ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 848617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 849617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 850617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 851617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 852617ba13bSMingming Cao .write_info = ext4_write_info 853ac27a0ecSDave Kleikamp }; 854ac27a0ecSDave Kleikamp 855617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 856617ba13bSMingming Cao .quota_on = ext4_quota_on, 857ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 858ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 859ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 860ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 861ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 862ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 863ac27a0ecSDave Kleikamp }; 864ac27a0ecSDave Kleikamp #endif 865ac27a0ecSDave Kleikamp 866ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 867617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 868617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 869617ba13bSMingming Cao .write_inode = ext4_write_inode, 870617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 871617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 872617ba13bSMingming Cao .put_super = ext4_put_super, 873617ba13bSMingming Cao .write_super = ext4_write_super, 874617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 875617ba13bSMingming Cao .write_super_lockfs = ext4_write_super_lockfs, 876617ba13bSMingming Cao .unlockfs = ext4_unlockfs, 877617ba13bSMingming Cao .statfs = ext4_statfs, 878617ba13bSMingming Cao .remount_fs = ext4_remount, 879617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 880617ba13bSMingming Cao .show_options = ext4_show_options, 881ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 882617ba13bSMingming Cao .quota_read = ext4_quota_read, 883617ba13bSMingming Cao .quota_write = ext4_quota_write, 884ac27a0ecSDave Kleikamp #endif 885ac27a0ecSDave Kleikamp }; 886ac27a0ecSDave Kleikamp 88739655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 8881b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 8891b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 890617ba13bSMingming Cao .get_parent = ext4_get_parent, 891ac27a0ecSDave Kleikamp }; 892ac27a0ecSDave Kleikamp 893ac27a0ecSDave Kleikamp enum { 894ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 895ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 896ac27a0ecSDave Kleikamp Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, 897ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 898ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 899ac27a0ecSDave Kleikamp Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, 900818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 901ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 902ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 903ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 904ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 90525ec56b5SJean Noel Cordenner Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, 90664769240SAlex Tomas Opt_mballoc, Opt_nomballoc, Opt_stripe, Opt_delalloc, 907ac27a0ecSDave Kleikamp }; 908ac27a0ecSDave Kleikamp 909ac27a0ecSDave Kleikamp static match_table_t tokens = { 910ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 911ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 912ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 913ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 914ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 915ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 916ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 917ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 918ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 919ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 920ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 921ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 922ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 923ac27a0ecSDave Kleikamp {Opt_nocheck, "nocheck"}, 924ac27a0ecSDave Kleikamp {Opt_nocheck, "check=none"}, 925ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 926ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 927ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 928ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 929ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 930ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 931ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 932ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 933ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 934ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 935ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 936ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 937ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 938ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 939ac27a0ecSDave Kleikamp {Opt_journal_inum, "journal=%u"}, 940ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 941818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 942818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 943ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 944ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 945ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 946ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 947ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 948ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 949ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 950ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 951ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 952ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 953ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 954ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 955ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 956ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 957ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 958a86c6181SAlex Tomas {Opt_extents, "extents"}, 9591e2462f9SMingming Cao {Opt_noextents, "noextents"}, 96025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 961c9de560dSAlex Tomas {Opt_mballoc, "mballoc"}, 962c9de560dSAlex Tomas {Opt_nomballoc, "nomballoc"}, 963c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 964ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 96564769240SAlex Tomas {Opt_delalloc, "delalloc"}, 966f3f12faaSJosef Bacik {Opt_err, NULL}, 967ac27a0ecSDave Kleikamp }; 968ac27a0ecSDave Kleikamp 969617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 970ac27a0ecSDave Kleikamp { 971617ba13bSMingming Cao ext4_fsblk_t sb_block; 972ac27a0ecSDave Kleikamp char *options = (char *) *data; 973ac27a0ecSDave Kleikamp 974ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 975ac27a0ecSDave Kleikamp return 1; /* Default location */ 976ac27a0ecSDave Kleikamp options += 3; 977617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 978ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 979ac27a0ecSDave Kleikamp if (*options && *options != ',') { 980617ba13bSMingming Cao printk("EXT4-fs: Invalid sb specification: %s\n", 981ac27a0ecSDave Kleikamp (char *) *data); 982ac27a0ecSDave Kleikamp return 1; 983ac27a0ecSDave Kleikamp } 984ac27a0ecSDave Kleikamp if (*options == ',') 985ac27a0ecSDave Kleikamp options++; 986ac27a0ecSDave Kleikamp *data = (void *) options; 987ac27a0ecSDave Kleikamp return sb_block; 988ac27a0ecSDave Kleikamp } 989ac27a0ecSDave Kleikamp 990ac27a0ecSDave Kleikamp static int parse_options (char *options, struct super_block *sb, 991ac27a0ecSDave Kleikamp unsigned int *inum, unsigned long *journal_devnum, 992617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 993ac27a0ecSDave Kleikamp { 994617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 995ac27a0ecSDave Kleikamp char * p; 996ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 997ac27a0ecSDave Kleikamp int data_opt = 0; 998ac27a0ecSDave Kleikamp int option; 999ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1000dfc5d03fSJan Kara int qtype, qfmt; 1001ac27a0ecSDave Kleikamp char *qname; 1002ac27a0ecSDave Kleikamp #endif 1003ac27a0ecSDave Kleikamp 1004ac27a0ecSDave Kleikamp if (!options) 1005ac27a0ecSDave Kleikamp return 1; 1006ac27a0ecSDave Kleikamp 1007ac27a0ecSDave Kleikamp while ((p = strsep (&options, ",")) != NULL) { 1008ac27a0ecSDave Kleikamp int token; 1009ac27a0ecSDave Kleikamp if (!*p) 1010ac27a0ecSDave Kleikamp continue; 1011ac27a0ecSDave Kleikamp 1012ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1013ac27a0ecSDave Kleikamp switch (token) { 1014ac27a0ecSDave Kleikamp case Opt_bsd_df: 1015ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, MINIX_DF); 1016ac27a0ecSDave Kleikamp break; 1017ac27a0ecSDave Kleikamp case Opt_minix_df: 1018ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, MINIX_DF); 1019ac27a0ecSDave Kleikamp break; 1020ac27a0ecSDave Kleikamp case Opt_grpid: 1021ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, GRPID); 1022ac27a0ecSDave Kleikamp break; 1023ac27a0ecSDave Kleikamp case Opt_nogrpid: 1024ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, GRPID); 1025ac27a0ecSDave Kleikamp break; 1026ac27a0ecSDave Kleikamp case Opt_resuid: 1027ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1028ac27a0ecSDave Kleikamp return 0; 1029ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1030ac27a0ecSDave Kleikamp break; 1031ac27a0ecSDave Kleikamp case Opt_resgid: 1032ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1033ac27a0ecSDave Kleikamp return 0; 1034ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1035ac27a0ecSDave Kleikamp break; 1036ac27a0ecSDave Kleikamp case Opt_sb: 1037ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1038ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1039ac27a0ecSDave Kleikamp break; 1040ac27a0ecSDave Kleikamp case Opt_err_panic: 1041ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 1042ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 1043ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_PANIC); 1044ac27a0ecSDave Kleikamp break; 1045ac27a0ecSDave Kleikamp case Opt_err_ro: 1046ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 1047ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 1048ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_RO); 1049ac27a0ecSDave Kleikamp break; 1050ac27a0ecSDave Kleikamp case Opt_err_cont: 1051ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 1052ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 1053ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_CONT); 1054ac27a0ecSDave Kleikamp break; 1055ac27a0ecSDave Kleikamp case Opt_nouid32: 1056ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NO_UID32); 1057ac27a0ecSDave Kleikamp break; 1058ac27a0ecSDave Kleikamp case Opt_nocheck: 1059ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, CHECK); 1060ac27a0ecSDave Kleikamp break; 1061ac27a0ecSDave Kleikamp case Opt_debug: 1062ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, DEBUG); 1063ac27a0ecSDave Kleikamp break; 1064ac27a0ecSDave Kleikamp case Opt_oldalloc: 1065ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, OLDALLOC); 1066ac27a0ecSDave Kleikamp break; 1067ac27a0ecSDave Kleikamp case Opt_orlov: 1068ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, OLDALLOC); 1069ac27a0ecSDave Kleikamp break; 1070617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 1071ac27a0ecSDave Kleikamp case Opt_user_xattr: 1072ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, XATTR_USER); 1073ac27a0ecSDave Kleikamp break; 1074ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1075ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, XATTR_USER); 1076ac27a0ecSDave Kleikamp break; 1077ac27a0ecSDave Kleikamp #else 1078ac27a0ecSDave Kleikamp case Opt_user_xattr: 1079ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1080617ba13bSMingming Cao printk("EXT4 (no)user_xattr options not supported\n"); 1081ac27a0ecSDave Kleikamp break; 1082ac27a0ecSDave Kleikamp #endif 1083617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1084ac27a0ecSDave Kleikamp case Opt_acl: 1085ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1086ac27a0ecSDave Kleikamp break; 1087ac27a0ecSDave Kleikamp case Opt_noacl: 1088ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1089ac27a0ecSDave Kleikamp break; 1090ac27a0ecSDave Kleikamp #else 1091ac27a0ecSDave Kleikamp case Opt_acl: 1092ac27a0ecSDave Kleikamp case Opt_noacl: 1093617ba13bSMingming Cao printk("EXT4 (no)acl options not supported\n"); 1094ac27a0ecSDave Kleikamp break; 1095ac27a0ecSDave Kleikamp #endif 1096ac27a0ecSDave Kleikamp case Opt_reservation: 1097ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1098ac27a0ecSDave Kleikamp break; 1099ac27a0ecSDave Kleikamp case Opt_noreservation: 1100ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 1101ac27a0ecSDave Kleikamp break; 1102ac27a0ecSDave Kleikamp case Opt_journal_update: 1103ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1104ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1105ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1106ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1107ac27a0ecSDave Kleikamp journal file. */ 1108ac27a0ecSDave Kleikamp if (is_remount) { 1109617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1110ac27a0ecSDave Kleikamp "journal on remount\n"); 1111ac27a0ecSDave Kleikamp return 0; 1112ac27a0ecSDave Kleikamp } 1113ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); 1114ac27a0ecSDave Kleikamp break; 1115ac27a0ecSDave Kleikamp case Opt_journal_inum: 1116ac27a0ecSDave Kleikamp if (is_remount) { 1117617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1118ac27a0ecSDave Kleikamp "journal on remount\n"); 1119ac27a0ecSDave Kleikamp return 0; 1120ac27a0ecSDave Kleikamp } 1121ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1122ac27a0ecSDave Kleikamp return 0; 1123ac27a0ecSDave Kleikamp *inum = option; 1124ac27a0ecSDave Kleikamp break; 1125ac27a0ecSDave Kleikamp case Opt_journal_dev: 1126ac27a0ecSDave Kleikamp if (is_remount) { 1127617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1128ac27a0ecSDave Kleikamp "journal on remount\n"); 1129ac27a0ecSDave Kleikamp return 0; 1130ac27a0ecSDave Kleikamp } 1131ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1132ac27a0ecSDave Kleikamp return 0; 1133ac27a0ecSDave Kleikamp *journal_devnum = option; 1134ac27a0ecSDave Kleikamp break; 1135818d276cSGirish Shilamkar case Opt_journal_checksum: 1136818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1137818d276cSGirish Shilamkar break; 1138818d276cSGirish Shilamkar case Opt_journal_async_commit: 1139818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1140818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1141818d276cSGirish Shilamkar break; 1142ac27a0ecSDave Kleikamp case Opt_noload: 1143ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NOLOAD); 1144ac27a0ecSDave Kleikamp break; 1145ac27a0ecSDave Kleikamp case Opt_commit: 1146ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1147ac27a0ecSDave Kleikamp return 0; 1148ac27a0ecSDave Kleikamp if (option < 0) 1149ac27a0ecSDave Kleikamp return 0; 1150ac27a0ecSDave Kleikamp if (option == 0) 1151cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1152ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1153ac27a0ecSDave Kleikamp break; 1154ac27a0ecSDave Kleikamp case Opt_data_journal: 1155617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1156ac27a0ecSDave Kleikamp goto datacheck; 1157ac27a0ecSDave Kleikamp case Opt_data_ordered: 1158617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1159ac27a0ecSDave Kleikamp goto datacheck; 1160ac27a0ecSDave Kleikamp case Opt_data_writeback: 1161617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1162ac27a0ecSDave Kleikamp datacheck: 1163ac27a0ecSDave Kleikamp if (is_remount) { 1164617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1165ac27a0ecSDave Kleikamp != data_opt) { 1166ac27a0ecSDave Kleikamp printk(KERN_ERR 1167617ba13bSMingming Cao "EXT4-fs: cannot change data " 1168ac27a0ecSDave Kleikamp "mode on remount\n"); 1169ac27a0ecSDave Kleikamp return 0; 1170ac27a0ecSDave Kleikamp } 1171ac27a0ecSDave Kleikamp } else { 1172617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1173ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1174ac27a0ecSDave Kleikamp } 1175ac27a0ecSDave Kleikamp break; 1176ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1177ac27a0ecSDave Kleikamp case Opt_usrjquota: 1178ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1179ac27a0ecSDave Kleikamp goto set_qf_name; 1180ac27a0ecSDave Kleikamp case Opt_grpjquota: 1181ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1182ac27a0ecSDave Kleikamp set_qf_name: 1183dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1184dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1185dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1186ac27a0ecSDave Kleikamp printk(KERN_ERR 11872c8be6b2SJan Kara "EXT4-fs: Cannot change journaled " 1188ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1189ac27a0ecSDave Kleikamp return 0; 1190ac27a0ecSDave Kleikamp } 1191ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1192ac27a0ecSDave Kleikamp if (!qname) { 1193ac27a0ecSDave Kleikamp printk(KERN_ERR 1194617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1195ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1196ac27a0ecSDave Kleikamp return 0; 1197ac27a0ecSDave Kleikamp } 1198ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1199ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1200ac27a0ecSDave Kleikamp printk(KERN_ERR 1201617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1202ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1203ac27a0ecSDave Kleikamp kfree(qname); 1204ac27a0ecSDave Kleikamp return 0; 1205ac27a0ecSDave Kleikamp } 1206ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1207ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1208ac27a0ecSDave Kleikamp printk(KERN_ERR 1209617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1210ac27a0ecSDave Kleikamp "filesystem root.\n"); 1211ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1212ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1213ac27a0ecSDave Kleikamp return 0; 1214ac27a0ecSDave Kleikamp } 1215ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1216ac27a0ecSDave Kleikamp break; 1217ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1218ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1219ac27a0ecSDave Kleikamp goto clear_qf_name; 1220ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1221ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1222ac27a0ecSDave Kleikamp clear_qf_name: 1223dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1224dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1225dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1226617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 12272c8be6b2SJan Kara "journaled quota options when " 1228ac27a0ecSDave Kleikamp "quota turned on.\n"); 1229ac27a0ecSDave Kleikamp return 0; 1230ac27a0ecSDave Kleikamp } 1231ac27a0ecSDave Kleikamp /* 1232ac27a0ecSDave Kleikamp * The space will be released later when all options 1233ac27a0ecSDave Kleikamp * are confirmed to be correct 1234ac27a0ecSDave Kleikamp */ 1235ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1236ac27a0ecSDave Kleikamp break; 1237ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1238dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1239dfc5d03fSJan Kara goto set_qf_format; 1240ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1241dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1242dfc5d03fSJan Kara set_qf_format: 1243dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1244dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1245dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1246dfc5d03fSJan Kara printk(KERN_ERR "EXT4-fs: Cannot change " 1247dfc5d03fSJan Kara "journaled quota options when " 1248dfc5d03fSJan Kara "quota turned on.\n"); 1249dfc5d03fSJan Kara return 0; 1250dfc5d03fSJan Kara } 1251dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1252ac27a0ecSDave Kleikamp break; 1253ac27a0ecSDave Kleikamp case Opt_quota: 1254ac27a0ecSDave Kleikamp case Opt_usrquota: 1255ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1256ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1257ac27a0ecSDave Kleikamp break; 1258ac27a0ecSDave Kleikamp case Opt_grpquota: 1259ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1260ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1261ac27a0ecSDave Kleikamp break; 1262ac27a0ecSDave Kleikamp case Opt_noquota: 1263ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1264617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1265ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1266ac27a0ecSDave Kleikamp return 0; 1267ac27a0ecSDave Kleikamp } 1268ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1269ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1270ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1271ac27a0ecSDave Kleikamp break; 1272ac27a0ecSDave Kleikamp #else 1273ac27a0ecSDave Kleikamp case Opt_quota: 1274ac27a0ecSDave Kleikamp case Opt_usrquota: 1275ac27a0ecSDave Kleikamp case Opt_grpquota: 1276cd59e7b9SJan Kara printk(KERN_ERR 1277cd59e7b9SJan Kara "EXT4-fs: quota options not supported.\n"); 1278cd59e7b9SJan Kara break; 1279ac27a0ecSDave Kleikamp case Opt_usrjquota: 1280ac27a0ecSDave Kleikamp case Opt_grpjquota: 1281ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1282ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1283ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1284ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1285ac27a0ecSDave Kleikamp printk(KERN_ERR 1286cd59e7b9SJan Kara "EXT4-fs: journaled quota options not " 1287ac27a0ecSDave Kleikamp "supported.\n"); 1288ac27a0ecSDave Kleikamp break; 1289ac27a0ecSDave Kleikamp case Opt_noquota: 1290ac27a0ecSDave Kleikamp break; 1291ac27a0ecSDave Kleikamp #endif 1292ac27a0ecSDave Kleikamp case Opt_abort: 1293ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1294ac27a0ecSDave Kleikamp break; 1295ac27a0ecSDave Kleikamp case Opt_barrier: 1296ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1297ac27a0ecSDave Kleikamp return 0; 1298ac27a0ecSDave Kleikamp if (option) 1299ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1300ac27a0ecSDave Kleikamp else 1301ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1302ac27a0ecSDave Kleikamp break; 1303ac27a0ecSDave Kleikamp case Opt_ignore: 1304ac27a0ecSDave Kleikamp break; 1305ac27a0ecSDave Kleikamp case Opt_resize: 1306ac27a0ecSDave Kleikamp if (!is_remount) { 1307617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1308ac27a0ecSDave Kleikamp "for remount\n"); 1309ac27a0ecSDave Kleikamp return 0; 1310ac27a0ecSDave Kleikamp } 1311ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1312ac27a0ecSDave Kleikamp return 0; 1313ac27a0ecSDave Kleikamp *n_blocks_count = option; 1314ac27a0ecSDave Kleikamp break; 1315ac27a0ecSDave Kleikamp case Opt_nobh: 1316ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1317ac27a0ecSDave Kleikamp break; 1318ac27a0ecSDave Kleikamp case Opt_bh: 1319ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1320ac27a0ecSDave Kleikamp break; 1321a86c6181SAlex Tomas case Opt_extents: 1322a86c6181SAlex Tomas set_opt (sbi->s_mount_opt, EXTENTS); 1323a86c6181SAlex Tomas break; 13241e2462f9SMingming Cao case Opt_noextents: 13251e2462f9SMingming Cao clear_opt (sbi->s_mount_opt, EXTENTS); 13261e2462f9SMingming Cao break; 132725ec56b5SJean Noel Cordenner case Opt_i_version: 132825ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 132925ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 133025ec56b5SJean Noel Cordenner break; 1331c9de560dSAlex Tomas case Opt_mballoc: 1332c9de560dSAlex Tomas set_opt(sbi->s_mount_opt, MBALLOC); 1333c9de560dSAlex Tomas break; 1334c9de560dSAlex Tomas case Opt_nomballoc: 1335c9de560dSAlex Tomas clear_opt(sbi->s_mount_opt, MBALLOC); 1336c9de560dSAlex Tomas break; 1337c9de560dSAlex Tomas case Opt_stripe: 1338c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1339c9de560dSAlex Tomas return 0; 1340c9de560dSAlex Tomas if (option < 0) 1341c9de560dSAlex Tomas return 0; 1342c9de560dSAlex Tomas sbi->s_stripe = option; 1343c9de560dSAlex Tomas break; 134464769240SAlex Tomas case Opt_delalloc: 134564769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 134664769240SAlex Tomas break; 1347ac27a0ecSDave Kleikamp default: 1348ac27a0ecSDave Kleikamp printk (KERN_ERR 1349617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1350ac27a0ecSDave Kleikamp "or missing value\n", p); 1351ac27a0ecSDave Kleikamp return 0; 1352ac27a0ecSDave Kleikamp } 1353ac27a0ecSDave Kleikamp } 1354ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1355ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1356617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1357ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1358ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1359ac27a0ecSDave Kleikamp 1360617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1361ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1362ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1363ac27a0ecSDave Kleikamp 1364ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1365617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1366ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1367617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1368617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1369ac27a0ecSDave Kleikamp "format mixing.\n"); 1370ac27a0ecSDave Kleikamp return 0; 1371ac27a0ecSDave Kleikamp } 1372ac27a0ecSDave Kleikamp 1373ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 13742c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 1375ac27a0ecSDave Kleikamp "not specified.\n"); 1376ac27a0ecSDave Kleikamp return 0; 1377ac27a0ecSDave Kleikamp } 1378ac27a0ecSDave Kleikamp } else { 1379ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 13802c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 13812c8be6b2SJan Kara "specified with no journaling " 1382ac27a0ecSDave Kleikamp "enabled.\n"); 1383ac27a0ecSDave Kleikamp return 0; 1384ac27a0ecSDave Kleikamp } 1385ac27a0ecSDave Kleikamp } 1386ac27a0ecSDave Kleikamp #endif 1387ac27a0ecSDave Kleikamp return 1; 1388ac27a0ecSDave Kleikamp } 1389ac27a0ecSDave Kleikamp 1390617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1391ac27a0ecSDave Kleikamp int read_only) 1392ac27a0ecSDave Kleikamp { 1393617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1394ac27a0ecSDave Kleikamp int res = 0; 1395ac27a0ecSDave Kleikamp 1396617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1397617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs warning: revision level too high, " 1398ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1399ac27a0ecSDave Kleikamp res = MS_RDONLY; 1400ac27a0ecSDave Kleikamp } 1401ac27a0ecSDave Kleikamp if (read_only) 1402ac27a0ecSDave Kleikamp return res; 1403617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1404617ba13bSMingming Cao printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1405ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1406617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1407ac27a0ecSDave Kleikamp printk (KERN_WARNING 1408617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1409ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1410ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1411ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1412ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1413ac27a0ecSDave Kleikamp printk (KERN_WARNING 1414617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1415ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1416ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1417ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1418ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1419ac27a0ecSDave Kleikamp printk (KERN_WARNING 1420617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1421ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1422ac27a0ecSDave Kleikamp #if 0 1423ac27a0ecSDave Kleikamp /* @@@ We _will_ want to clear the valid bit if we find 142463f57933SAndrew Morton * inconsistencies, to force a fsck at reboot. But for 142563f57933SAndrew Morton * a plain journaled filesystem we can keep it set as 142663f57933SAndrew Morton * valid forever! :) 142763f57933SAndrew Morton */ 1428216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1429ac27a0ecSDave Kleikamp #endif 1430ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1431617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1432e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1433ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1434617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 1435617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1436ac27a0ecSDave Kleikamp 1437617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1438ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1439617ba13bSMingming Cao printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " 1440ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1441ac27a0ecSDave Kleikamp sb->s_blocksize, 1442ac27a0ecSDave Kleikamp sbi->s_groups_count, 1443617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1444617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1445ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1446ac27a0ecSDave Kleikamp 1447617ba13bSMingming Cao printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); 1448617ba13bSMingming Cao if (EXT4_SB(sb)->s_journal->j_inode == NULL) { 1449ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 1450ac27a0ecSDave Kleikamp 1451ac27a0ecSDave Kleikamp printk("external journal on %s\n", 1452617ba13bSMingming Cao bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); 1453ac27a0ecSDave Kleikamp } else { 1454ac27a0ecSDave Kleikamp printk("internal journal\n"); 1455ac27a0ecSDave Kleikamp } 1456ac27a0ecSDave Kleikamp return res; 1457ac27a0ecSDave Kleikamp } 1458ac27a0ecSDave Kleikamp 1459772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1460772cb7c8SJose R. Santos { 1461772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1462772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1463772cb7c8SJose R. Santos struct buffer_head *bh; 1464772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1465772cb7c8SJose R. Santos ext4_group_t flex_group; 1466772cb7c8SJose R. Santos int groups_per_flex = 0; 1467772cb7c8SJose R. Santos __u64 block_bitmap = 0; 1468772cb7c8SJose R. Santos int i; 1469772cb7c8SJose R. Santos 1470772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1471772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1472772cb7c8SJose R. Santos return 1; 1473772cb7c8SJose R. Santos } 1474772cb7c8SJose R. Santos 1475772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1476772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1477772cb7c8SJose R. Santos 1478772cb7c8SJose R. Santos flex_group_count = (sbi->s_groups_count + groups_per_flex - 1) / 1479772cb7c8SJose R. Santos groups_per_flex; 1480772cb7c8SJose R. Santos sbi->s_flex_groups = kmalloc(flex_group_count * 1481772cb7c8SJose R. Santos sizeof(struct flex_groups), GFP_KERNEL); 1482772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1483772cb7c8SJose R. Santos printk(KERN_ERR "EXT4-fs: not enough memory\n"); 1484772cb7c8SJose R. Santos goto failed; 1485772cb7c8SJose R. Santos } 1486772cb7c8SJose R. Santos memset(sbi->s_flex_groups, 0, flex_group_count * 1487772cb7c8SJose R. Santos sizeof(struct flex_groups)); 1488772cb7c8SJose R. Santos 1489772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, 1, &bh); 1490772cb7c8SJose R. Santos block_bitmap = ext4_block_bitmap(sb, gdp) - 1; 1491772cb7c8SJose R. Santos 1492772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 1493772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, i, &bh); 1494772cb7c8SJose R. Santos 1495772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 1496772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_inodes += 1497772cb7c8SJose R. Santos le16_to_cpu(gdp->bg_free_inodes_count); 1498772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_blocks += 1499772cb7c8SJose R. Santos le16_to_cpu(gdp->bg_free_blocks_count); 1500772cb7c8SJose R. Santos } 1501772cb7c8SJose R. Santos 1502772cb7c8SJose R. Santos return 1; 1503772cb7c8SJose R. Santos failed: 1504772cb7c8SJose R. Santos return 0; 1505772cb7c8SJose R. Santos } 1506772cb7c8SJose R. Santos 1507717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1508717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1509717d50e4SAndreas Dilger { 1510717d50e4SAndreas Dilger __u16 crc = 0; 1511717d50e4SAndreas Dilger 1512717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1513717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1514717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1515717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1516717d50e4SAndreas Dilger 1517717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1518717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1519717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1520717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1521717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1522717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1523717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1524717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1525717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1526717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1527717d50e4SAndreas Dilger offset); 1528717d50e4SAndreas Dilger } 1529717d50e4SAndreas Dilger 1530717d50e4SAndreas Dilger return cpu_to_le16(crc); 1531717d50e4SAndreas Dilger } 1532717d50e4SAndreas Dilger 1533717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1534717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1535717d50e4SAndreas Dilger { 1536717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1537717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1538717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1539717d50e4SAndreas Dilger return 0; 1540717d50e4SAndreas Dilger 1541717d50e4SAndreas Dilger return 1; 1542717d50e4SAndreas Dilger } 1543717d50e4SAndreas Dilger 1544ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1545617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1546ac27a0ecSDave Kleikamp { 1547617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1548617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1549617ba13bSMingming Cao ext4_fsblk_t last_block; 1550bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1551bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1552bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1553ce421581SJose R. Santos int flexbg_flag = 0; 1554fd2d4291SAvantika Mathur ext4_group_t i; 1555ac27a0ecSDave Kleikamp 1556ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1557ce421581SJose R. Santos flexbg_flag = 1; 1558ce421581SJose R. Santos 1559617ba13bSMingming Cao ext4_debug ("Checking group descriptors"); 1560ac27a0ecSDave Kleikamp 1561197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1562197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1563197cd65aSAkinobu Mita 1564ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1565bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1566ac27a0ecSDave Kleikamp else 1567ac27a0ecSDave Kleikamp last_block = first_block + 1568617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1569ac27a0ecSDave Kleikamp 15708fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 1571bd81d8eeSLaurent Vivier if (block_bitmap < first_block || block_bitmap > last_block) 1572ac27a0ecSDave Kleikamp { 1573c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1574c19204b0SJosef Bacik "Block bitmap for group %lu not in group " 1575c19204b0SJosef Bacik "(block %llu)!", i, block_bitmap); 1576ac27a0ecSDave Kleikamp return 0; 1577ac27a0ecSDave Kleikamp } 15788fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 1579bd81d8eeSLaurent Vivier if (inode_bitmap < first_block || inode_bitmap > last_block) 1580ac27a0ecSDave Kleikamp { 1581c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1582c19204b0SJosef Bacik "Inode bitmap for group %lu not in group " 1583c19204b0SJosef Bacik "(block %llu)!", i, inode_bitmap); 1584ac27a0ecSDave Kleikamp return 0; 1585ac27a0ecSDave Kleikamp } 15868fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1587bd81d8eeSLaurent Vivier if (inode_table < first_block || 1588780dcdb2SEric Sandeen inode_table + sbi->s_itb_per_group - 1 > last_block) 1589ac27a0ecSDave Kleikamp { 1590c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1591c19204b0SJosef Bacik "Inode table for group %lu not in group " 1592c19204b0SJosef Bacik "(block %llu)!", i, inode_table); 1593ac27a0ecSDave Kleikamp return 0; 1594ac27a0ecSDave Kleikamp } 1595717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1596c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1597fd2d4291SAvantika Mathur "Checksum for group %lu failed (%u!=%u)\n", 1598fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1599fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 1600717d50e4SAndreas Dilger return 0; 1601717d50e4SAndreas Dilger } 1602ce421581SJose R. Santos if (!flexbg_flag) 1603617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1604ac27a0ecSDave Kleikamp } 1605ac27a0ecSDave Kleikamp 1606bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1607617ba13bSMingming Cao sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); 1608ac27a0ecSDave Kleikamp return 1; 1609ac27a0ecSDave Kleikamp } 1610ac27a0ecSDave Kleikamp 1611617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1612ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1613ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1614ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1615ac27a0ecSDave Kleikamp * 1616ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1617ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1618ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1619ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1620ac27a0ecSDave Kleikamp * 1621ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1622ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1623ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1624617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1625ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1626ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1627ac27a0ecSDave Kleikamp */ 1628617ba13bSMingming Cao static void ext4_orphan_cleanup (struct super_block * sb, 1629617ba13bSMingming Cao struct ext4_super_block * es) 1630ac27a0ecSDave Kleikamp { 1631ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1632ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1633ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1634ac27a0ecSDave Kleikamp int i; 1635ac27a0ecSDave Kleikamp #endif 1636ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1637ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1638ac27a0ecSDave Kleikamp return; 1639ac27a0ecSDave Kleikamp } 1640ac27a0ecSDave Kleikamp 1641a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1642a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1643a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1644a8f48a95SEric Sandeen return; 1645a8f48a95SEric Sandeen } 1646a8f48a95SEric Sandeen 1647617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1648ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1649ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1650ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1651ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1652ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1653ac27a0ecSDave Kleikamp return; 1654ac27a0ecSDave Kleikamp } 1655ac27a0ecSDave Kleikamp 1656ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1657617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1658ac27a0ecSDave Kleikamp sb->s_id); 1659ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1660ac27a0ecSDave Kleikamp } 1661ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1662ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1663ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1664ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1665ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1666617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1667617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1668ac27a0ecSDave Kleikamp if (ret < 0) 1669ac27a0ecSDave Kleikamp printk(KERN_ERR 16702c8be6b2SJan Kara "EXT4-fs: Cannot turn on journaled " 1671ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1672ac27a0ecSDave Kleikamp } 1673ac27a0ecSDave Kleikamp } 1674ac27a0ecSDave Kleikamp #endif 1675ac27a0ecSDave Kleikamp 1676ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1677ac27a0ecSDave Kleikamp struct inode *inode; 1678ac27a0ecSDave Kleikamp 167997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 168097bd42b9SJosef Bacik if (IS_ERR(inode)) { 1681ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1682ac27a0ecSDave Kleikamp break; 1683ac27a0ecSDave Kleikamp } 1684ac27a0ecSDave Kleikamp 1685617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1686ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1687ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1688ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1689ac27a0ecSDave Kleikamp "%s: truncating inode %lu to %Ld bytes\n", 169046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1691ac27a0ecSDave Kleikamp jbd_debug(2, "truncating inode %lu to %Ld bytes\n", 1692ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1693617ba13bSMingming Cao ext4_truncate(inode); 1694ac27a0ecSDave Kleikamp nr_truncates++; 1695ac27a0ecSDave Kleikamp } else { 1696ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1697ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 169846e665e9SHarvey Harrison __func__, inode->i_ino); 1699ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1700ac27a0ecSDave Kleikamp inode->i_ino); 1701ac27a0ecSDave Kleikamp nr_orphans++; 1702ac27a0ecSDave Kleikamp } 1703ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1704ac27a0ecSDave Kleikamp } 1705ac27a0ecSDave Kleikamp 1706ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x)==1) ? "" : "s" 1707ac27a0ecSDave Kleikamp 1708ac27a0ecSDave Kleikamp if (nr_orphans) 1709617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1710ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1711ac27a0ecSDave Kleikamp if (nr_truncates) 1712617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1713ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1714ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1715ac27a0ecSDave Kleikamp /* Turn quotas off */ 1716ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1717ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 17186f28e087SJan Kara vfs_quota_off(sb, i, 0); 1719ac27a0ecSDave Kleikamp } 1720ac27a0ecSDave Kleikamp #endif 1721ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1722ac27a0ecSDave Kleikamp } 1723cd2291a4SEric Sandeen /* 1724cd2291a4SEric Sandeen * Maximal extent format file size. 1725cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1726cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1727cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1728cd2291a4SEric Sandeen * so that won't be a limiting factor. 1729cd2291a4SEric Sandeen * 1730cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1731cd2291a4SEric Sandeen */ 1732cd2291a4SEric Sandeen static loff_t ext4_max_size(int blkbits) 1733cd2291a4SEric Sandeen { 1734cd2291a4SEric Sandeen loff_t res; 1735cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1736cd2291a4SEric Sandeen 1737cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1738cd2291a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 1739cd2291a4SEric Sandeen /* 1740cd2291a4SEric Sandeen * CONFIG_LSF is not enabled implies the inode 1741cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1742cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1743cd2291a4SEric Sandeen */ 1744cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1745cd2291a4SEric Sandeen 1746cd2291a4SEric Sandeen /* total blocks in file system block size */ 1747cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1748cd2291a4SEric Sandeen upper_limit <<= blkbits; 1749cd2291a4SEric Sandeen } 1750cd2291a4SEric Sandeen 1751cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1752cd2291a4SEric Sandeen res = 1LL << 32; 1753cd2291a4SEric Sandeen res <<= blkbits; 1754cd2291a4SEric Sandeen res -= 1; 1755cd2291a4SEric Sandeen 1756cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1757cd2291a4SEric Sandeen if (res > upper_limit) 1758cd2291a4SEric Sandeen res = upper_limit; 1759cd2291a4SEric Sandeen 1760cd2291a4SEric Sandeen return res; 1761cd2291a4SEric Sandeen } 1762ac27a0ecSDave Kleikamp 1763ac27a0ecSDave Kleikamp /* 1764cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 17650fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 17660fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1767ac27a0ecSDave Kleikamp */ 1768cd2291a4SEric Sandeen static loff_t ext4_max_bitmap_size(int bits) 1769ac27a0ecSDave Kleikamp { 1770617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 17710fc1b451SAneesh Kumar K.V int meta_blocks; 17720fc1b451SAneesh Kumar K.V loff_t upper_limit; 17730fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1774cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1775ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 17760fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 17770fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 17780fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 17790fc1b451SAneesh Kumar K.V */ 17800fc1b451SAneesh Kumar K.V 17810fc1b451SAneesh Kumar K.V if (sizeof(blkcnt_t) < sizeof(u64)) { 17820fc1b451SAneesh Kumar K.V /* 17830fc1b451SAneesh Kumar K.V * CONFIG_LSF is not enabled implies the inode 17840fc1b451SAneesh Kumar K.V * i_block represent total blocks in 512 bytes 17850fc1b451SAneesh Kumar K.V * 32 == size of vfs inode i_blocks * 8 17860fc1b451SAneesh Kumar K.V */ 17870fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 17880fc1b451SAneesh Kumar K.V 17890fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 17900fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 17910fc1b451SAneesh Kumar K.V 17920fc1b451SAneesh Kumar K.V } else { 17938180a562SAneesh Kumar K.V /* 17948180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 17958180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 17968180a562SAneesh Kumar K.V * represent total number of blocks in 17978180a562SAneesh Kumar K.V * file system block size 17988180a562SAneesh Kumar K.V */ 17990fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 18000fc1b451SAneesh Kumar K.V 18010fc1b451SAneesh Kumar K.V } 18020fc1b451SAneesh Kumar K.V 18030fc1b451SAneesh Kumar K.V /* indirect blocks */ 18040fc1b451SAneesh Kumar K.V meta_blocks = 1; 18050fc1b451SAneesh Kumar K.V /* double indirect blocks */ 18060fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 18070fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 18080fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 18090fc1b451SAneesh Kumar K.V 18100fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 18110fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1812ac27a0ecSDave Kleikamp 1813ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1814ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1815ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1816ac27a0ecSDave Kleikamp res <<= bits; 1817ac27a0ecSDave Kleikamp if (res > upper_limit) 1818ac27a0ecSDave Kleikamp res = upper_limit; 18190fc1b451SAneesh Kumar K.V 18200fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 18210fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 18220fc1b451SAneesh Kumar K.V 1823ac27a0ecSDave Kleikamp return res; 1824ac27a0ecSDave Kleikamp } 1825ac27a0ecSDave Kleikamp 1826617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 182770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1828ac27a0ecSDave Kleikamp { 1829617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1830fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1831ac27a0ecSDave Kleikamp int has_super = 0; 1832ac27a0ecSDave Kleikamp 1833ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1834ac27a0ecSDave Kleikamp 1835617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1836ac27a0ecSDave Kleikamp nr < first_meta_bg) 183770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1838ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1839617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1840ac27a0ecSDave Kleikamp has_super = 1; 1841617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1842ac27a0ecSDave Kleikamp } 1843ac27a0ecSDave Kleikamp 1844c9de560dSAlex Tomas /** 1845c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 1846c9de560dSAlex Tomas * @sbi: In memory super block info 1847c9de560dSAlex Tomas * 1848c9de560dSAlex Tomas * If we have specified it via mount option, then 1849c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 1850c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 1851c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 1852c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 1853c9de560dSAlex Tomas * 1854c9de560dSAlex Tomas */ 1855c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 1856c9de560dSAlex Tomas { 1857c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 1858c9de560dSAlex Tomas unsigned long stripe_width = 1859c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 1860c9de560dSAlex Tomas 1861c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 1862c9de560dSAlex Tomas return sbi->s_stripe; 1863c9de560dSAlex Tomas 1864c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 1865c9de560dSAlex Tomas return stripe_width; 1866c9de560dSAlex Tomas 1867c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 1868c9de560dSAlex Tomas return stride; 1869c9de560dSAlex Tomas 1870c9de560dSAlex Tomas return 0; 1871c9de560dSAlex Tomas } 1872ac27a0ecSDave Kleikamp 1873617ba13bSMingming Cao static int ext4_fill_super (struct super_block *sb, void *data, int silent) 18747477827fSAneesh Kumar K.V __releases(kernel_lock) 18757477827fSAneesh Kumar K.V __acquires(kernel_lock) 18761d03ec98SAneesh Kumar K.V 1877ac27a0ecSDave Kleikamp { 1878ac27a0ecSDave Kleikamp struct buffer_head * bh; 1879617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1880617ba13bSMingming Cao struct ext4_sb_info *sbi; 1881617ba13bSMingming Cao ext4_fsblk_t block; 1882617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 188370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 1884ac27a0ecSDave Kleikamp unsigned long offset = 0; 1885ac27a0ecSDave Kleikamp unsigned int journal_inum = 0; 1886ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 1887ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 1888ac27a0ecSDave Kleikamp struct inode *root; 18891d1fe1eeSDavid Howells int ret = -EINVAL; 1890ac27a0ecSDave Kleikamp int blocksize; 1891ac27a0ecSDave Kleikamp int db_count; 1892ac27a0ecSDave Kleikamp int i; 1893ac27a0ecSDave Kleikamp int needs_recovery; 1894ac27a0ecSDave Kleikamp __le32 features; 1895bd81d8eeSLaurent Vivier __u64 blocks_count; 1896833f4077SPeter Zijlstra int err; 1897ac27a0ecSDave Kleikamp 1898ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 1899ac27a0ecSDave Kleikamp if (!sbi) 1900ac27a0ecSDave Kleikamp return -ENOMEM; 1901ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 1902ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 1903617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 1904617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 1905d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 1906ac27a0ecSDave Kleikamp 1907ac27a0ecSDave Kleikamp unlock_kernel(); 1908ac27a0ecSDave Kleikamp 1909617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 1910ac27a0ecSDave Kleikamp if (!blocksize) { 1911617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 1912ac27a0ecSDave Kleikamp goto out_fail; 1913ac27a0ecSDave Kleikamp } 1914ac27a0ecSDave Kleikamp 1915ac27a0ecSDave Kleikamp /* 1916617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 1917ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 1918ac27a0ecSDave Kleikamp */ 1919617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 192070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 192170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 1922ac27a0ecSDave Kleikamp } else { 192370bbb3e0SAndrew Morton logical_sb_block = sb_block; 1924ac27a0ecSDave Kleikamp } 1925ac27a0ecSDave Kleikamp 192670bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 1927617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); 1928ac27a0ecSDave Kleikamp goto out_fail; 1929ac27a0ecSDave Kleikamp } 1930ac27a0ecSDave Kleikamp /* 1931ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 1932617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 1933ac27a0ecSDave Kleikamp */ 1934617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 1935ac27a0ecSDave Kleikamp sbi->s_es = es; 1936ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 1937617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 1938617ba13bSMingming Cao goto cantfind_ext4; 1939ac27a0ecSDave Kleikamp 1940ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 1941ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1942617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 1943ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1944617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 1945ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1946617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 1947ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 19482e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_XATTR 1949617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 1950ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 19512e7842b8SHugh Dickins #endif 19522e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1953617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 1954ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 19552e7842b8SHugh Dickins #endif 1956617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 1957617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 1958617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 1959617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 1960617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 1961617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 1962ac27a0ecSDave Kleikamp 1963617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 1964ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1965bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 1966ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 1967bb4f397aSAneesh Kumar K.V else 1968bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 1969ac27a0ecSDave Kleikamp 1970ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 1971ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 1972ac27a0ecSDave Kleikamp 1973ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1974571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 1975ac27a0ecSDave Kleikamp 19761e2462f9SMingming Cao /* 19771e2462f9SMingming Cao * turn on extents feature by default in ext4 filesystem 19781e2462f9SMingming Cao * User -o noextents to turn it off 19791e2462f9SMingming Cao */ 19801e2462f9SMingming Cao set_opt(sbi->s_mount_opt, EXTENTS); 19813dbd0edeSAneesh Kumar K.V /* 19823dbd0edeSAneesh Kumar K.V * turn on mballoc feature by default in ext4 filesystem 19833dbd0edeSAneesh Kumar K.V * User -o nomballoc to turn it off 19843dbd0edeSAneesh Kumar K.V */ 19853dbd0edeSAneesh Kumar K.V set_opt(sbi->s_mount_opt, MBALLOC); 19861e2462f9SMingming Cao 1987ac27a0ecSDave Kleikamp if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, 1988ac27a0ecSDave Kleikamp NULL, 0)) 1989ac27a0ecSDave Kleikamp goto failed_mount; 1990ac27a0ecSDave Kleikamp 1991ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1992617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1993ac27a0ecSDave Kleikamp 1994617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 1995617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 1996617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 1997617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 1998ac27a0ecSDave Kleikamp printk(KERN_WARNING 1999617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 2000ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 2001469108ffSTheodore Tso 2002469108ffSTheodore Tso /* 2003469108ffSTheodore Tso * Since ext4 is still considered development code, we require 2004469108ffSTheodore Tso * that the TEST_FILESYS flag in s->flags be set. 2005469108ffSTheodore Tso */ 2006469108ffSTheodore Tso if (!(le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)) { 2007469108ffSTheodore Tso printk(KERN_WARNING "EXT4-fs: %s: not marked " 2008469108ffSTheodore Tso "OK to use with test code.\n", sb->s_id); 2009469108ffSTheodore Tso goto failed_mount; 2010469108ffSTheodore Tso } 2011469108ffSTheodore Tso 2012ac27a0ecSDave Kleikamp /* 2013ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2014ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2015ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2016ac27a0ecSDave Kleikamp */ 2017617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2018ac27a0ecSDave Kleikamp if (features) { 2019617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 2020ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 2021ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 2022ac27a0ecSDave Kleikamp goto failed_mount; 2023ac27a0ecSDave Kleikamp } 2024617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2025ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2026617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 2027ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 2028ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 2029ac27a0ecSDave Kleikamp goto failed_mount; 2030ac27a0ecSDave Kleikamp } 20310fc1b451SAneesh Kumar K.V if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 20320fc1b451SAneesh Kumar K.V /* 20330fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 20340fc1b451SAneesh Kumar K.V * mount if kernel is build with CONFIG_LSF 20350fc1b451SAneesh Kumar K.V */ 20360fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 20370fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 20380fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 20390fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 20400fc1b451SAneesh Kumar K.V "without CONFIG_LSF.\n", sb->s_id); 20410fc1b451SAneesh Kumar K.V goto failed_mount; 20420fc1b451SAneesh Kumar K.V } 20430fc1b451SAneesh Kumar K.V } 2044ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2045ac27a0ecSDave Kleikamp 2046617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2047617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2048ac27a0ecSDave Kleikamp printk(KERN_ERR 2049617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 2050ac27a0ecSDave Kleikamp blocksize, sb->s_id); 2051ac27a0ecSDave Kleikamp goto failed_mount; 2052ac27a0ecSDave Kleikamp } 2053ac27a0ecSDave Kleikamp 2054ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2055ce40733cSAneesh Kumar K.V 2056ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2057ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2058ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 2059ce40733cSAneesh Kumar K.V blocksize); 2060ac27a0ecSDave Kleikamp goto failed_mount; 2061ac27a0ecSDave Kleikamp } 2062ac27a0ecSDave Kleikamp 2063ac27a0ecSDave Kleikamp brelse (bh); 206470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 206570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 206670bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2067ac27a0ecSDave Kleikamp if (!bh) { 2068ac27a0ecSDave Kleikamp printk(KERN_ERR 2069617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 2070ac27a0ecSDave Kleikamp goto failed_mount; 2071ac27a0ecSDave Kleikamp } 2072617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2073ac27a0ecSDave Kleikamp sbi->s_es = es; 2074617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2075ac27a0ecSDave Kleikamp printk (KERN_ERR 2076617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 2077ac27a0ecSDave Kleikamp goto failed_mount; 2078ac27a0ecSDave Kleikamp } 2079ac27a0ecSDave Kleikamp } 2080ac27a0ecSDave Kleikamp 2081e2b46574SEric Sandeen sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits); 2082617ba13bSMingming Cao sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); 2083ac27a0ecSDave Kleikamp 2084617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2085617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2086617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2087ac27a0ecSDave Kleikamp } else { 2088ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2089ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2090617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 20911330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2092ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2093ac27a0ecSDave Kleikamp printk (KERN_ERR 2094617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2095ac27a0ecSDave Kleikamp sbi->s_inode_size); 2096ac27a0ecSDave Kleikamp goto failed_mount; 2097ac27a0ecSDave Kleikamp } 2098ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2099ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2100ac27a0ecSDave Kleikamp } 21010d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 21020d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 21038fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 21040d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2105d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 21060d1ee42fSAlexandre Ratchov printk(KERN_ERR 21078fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 21080d1ee42fSAlexandre Ratchov sbi->s_desc_size); 21090d1ee42fSAlexandre Ratchov goto failed_mount; 21100d1ee42fSAlexandre Ratchov } 21110d1ee42fSAlexandre Ratchov } else 21120d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2113ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2114ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2115b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2116617ba13bSMingming Cao goto cantfind_ext4; 2117617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2118ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2119617ba13bSMingming Cao goto cantfind_ext4; 2120ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2121ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 21220d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2123ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2124ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2125e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2126e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2127ac27a0ecSDave Kleikamp for (i=0; i < 4; i++) 2128ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2129ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2130ac27a0ecSDave Kleikamp 2131ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2132ac27a0ecSDave Kleikamp printk (KERN_ERR 2133617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2134ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2135ac27a0ecSDave Kleikamp goto failed_mount; 2136ac27a0ecSDave Kleikamp } 2137ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2138ac27a0ecSDave Kleikamp printk (KERN_ERR 2139617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2140ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2141ac27a0ecSDave Kleikamp goto failed_mount; 2142ac27a0ecSDave Kleikamp } 2143ac27a0ecSDave Kleikamp 2144bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2145ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2146617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2147ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2148ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2149617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2150ac27a0ecSDave Kleikamp "enabled\n"); 2151ac27a0ecSDave Kleikamp goto failed_mount; 2152ac27a0ecSDave Kleikamp } 2153ac27a0ecSDave Kleikamp 2154617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2155617ba13bSMingming Cao goto cantfind_ext4; 2156e7c95593SEric Sandeen 2157e7c95593SEric Sandeen /* ensure blocks_count calculation below doesn't sign-extend */ 2158e7c95593SEric Sandeen if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < 2159e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block) + 1) { 2160e7c95593SEric Sandeen printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " 2161e7c95593SEric Sandeen "first data block %u, blocks per group %lu\n", 2162e7c95593SEric Sandeen ext4_blocks_count(es), 2163e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 2164e7c95593SEric Sandeen EXT4_BLOCKS_PER_GROUP(sb)); 2165e7c95593SEric Sandeen goto failed_mount; 2166e7c95593SEric Sandeen } 2167bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2168bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2169bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2170bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 2171bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2172617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2173617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2174ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), 2175ac27a0ecSDave Kleikamp GFP_KERNEL); 2176ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2177617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: not enough memory\n"); 2178ac27a0ecSDave Kleikamp goto failed_mount; 2179ac27a0ecSDave Kleikamp } 2180ac27a0ecSDave Kleikamp 2181ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 2182ac27a0ecSDave Kleikamp 2183ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 218470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2185ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2186ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2187617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: " 2188ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2189ac27a0ecSDave Kleikamp db_count = i; 2190ac27a0ecSDave Kleikamp goto failed_mount2; 2191ac27a0ecSDave Kleikamp } 2192ac27a0ecSDave Kleikamp } 2193617ba13bSMingming Cao if (!ext4_check_descriptors (sb)) { 2194617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2195ac27a0ecSDave Kleikamp goto failed_mount2; 2196ac27a0ecSDave Kleikamp } 2197772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2198772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2199772cb7c8SJose R. Santos printk(KERN_ERR 2200772cb7c8SJose R. Santos "EXT4-fs: unable to initialize " 2201772cb7c8SJose R. Santos "flex_bg meta info!\n"); 2202772cb7c8SJose R. Santos goto failed_mount2; 2203772cb7c8SJose R. Santos } 2204772cb7c8SJose R. Santos 2205ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2206ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2207ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2208ac27a0ecSDave Kleikamp 2209833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2210617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2211833f4077SPeter Zijlstra if (!err) { 2212833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2213617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2214833f4077SPeter Zijlstra } 2215833f4077SPeter Zijlstra if (!err) { 2216833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2217617ba13bSMingming Cao ext4_count_dirs(sb)); 2218833f4077SPeter Zijlstra } 2219833f4077SPeter Zijlstra if (err) { 2220833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2221833f4077SPeter Zijlstra goto failed_mount3; 2222833f4077SPeter Zijlstra } 2223ac27a0ecSDave Kleikamp 2224ac27a0ecSDave Kleikamp /* per fileystem reservation list head & lock */ 2225ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_rsv_window_lock); 2226ac27a0ecSDave Kleikamp sbi->s_rsv_window_root = RB_ROOT; 2227ac27a0ecSDave Kleikamp /* Add a single, static dummy reservation to the start of the 2228ac27a0ecSDave Kleikamp * reservation window list --- it gives us a placeholder for 2229ac27a0ecSDave Kleikamp * append-at-start-of-list which makes the allocation logic 2230ac27a0ecSDave Kleikamp * _much_ simpler. */ 2231617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 2232617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 2233ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_alloc_hit = 0; 2234ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_goal_size = 0; 2235617ba13bSMingming Cao ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); 2236ac27a0ecSDave Kleikamp 2237c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2238c9de560dSAlex Tomas 2239ac27a0ecSDave Kleikamp /* 2240ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2241ac27a0ecSDave Kleikamp */ 2242617ba13bSMingming Cao sb->s_op = &ext4_sops; 2243617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2244617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2245ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2246617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2247617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2248ac27a0ecSDave Kleikamp #endif 2249ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2250ac27a0ecSDave Kleikamp 2251ac27a0ecSDave Kleikamp sb->s_root = NULL; 2252ac27a0ecSDave Kleikamp 2253ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2254617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2255617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2256ac27a0ecSDave Kleikamp 2257ac27a0ecSDave Kleikamp /* 2258ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2259ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2260ac27a0ecSDave Kleikamp */ 2261ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2262617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2263617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2264ac27a0ecSDave Kleikamp goto failed_mount3; 2265624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2266624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2267624080edSTheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): " 2268624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2269624080edSTheodore Ts'o "%u is corrupt\n", sb->s_id, 2270624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2271624080edSTheodore Ts'o if (test_opt (sb, ERRORS_RO)) { 2272624080edSTheodore Ts'o printk (KERN_CRIT 2273624080edSTheodore Ts'o "Mounting filesystem read-only\n"); 2274624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2275624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2276624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2277624080edSTheodore Ts'o } 2278624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2279624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2280624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2281624080edSTheodore Ts'o ext4_commit_super(sb, es, 1); 2282624080edSTheodore Ts'o printk(KERN_CRIT 2283624080edSTheodore Ts'o "EXT4-fs (device %s): mount failed\n", 2284624080edSTheodore Ts'o sb->s_id); 2285624080edSTheodore Ts'o goto failed_mount4; 2286624080edSTheodore Ts'o } 2287624080edSTheodore Ts'o } 2288ac27a0ecSDave Kleikamp } else if (journal_inum) { 2289617ba13bSMingming Cao if (ext4_create_journal(sb, es, journal_inum)) 2290ac27a0ecSDave Kleikamp goto failed_mount3; 2291ac27a0ecSDave Kleikamp } else { 2292ac27a0ecSDave Kleikamp if (!silent) 2293ac27a0ecSDave Kleikamp printk (KERN_ERR 2294617ba13bSMingming Cao "ext4: No journal on filesystem on %s\n", 2295ac27a0ecSDave Kleikamp sb->s_id); 2296ac27a0ecSDave Kleikamp goto failed_mount3; 2297ac27a0ecSDave Kleikamp } 2298ac27a0ecSDave Kleikamp 2299eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2300eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2301eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2302eb40a09cSJose R. Santos printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); 2303eb40a09cSJose R. Santos goto failed_mount4; 2304eb40a09cSJose R. Santos } 2305eb40a09cSJose R. Santos 2306818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2307818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2308818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2309818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2310818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2311818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2312818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2313818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2314818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2315818d276cSGirish Shilamkar } else { 2316818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2317818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2318818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2319818d276cSGirish Shilamkar } 2320818d276cSGirish Shilamkar 2321ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2322ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2323ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2324ac27a0ecSDave Kleikamp case 0: 2325ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 232663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 232763f57933SAndrew Morton * cope, else JOURNAL_DATA 232863f57933SAndrew Morton */ 2329dab291afSMingming Cao if (jbd2_journal_check_available_features 2330dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2331ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2332ac27a0ecSDave Kleikamp else 2333ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2334ac27a0ecSDave Kleikamp break; 2335ac27a0ecSDave Kleikamp 2336617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2337617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2338dab291afSMingming Cao if (!jbd2_journal_check_available_features 2339dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2340617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2341ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2342ac27a0ecSDave Kleikamp goto failed_mount4; 2343ac27a0ecSDave Kleikamp } 2344ac27a0ecSDave Kleikamp default: 2345ac27a0ecSDave Kleikamp break; 2346ac27a0ecSDave Kleikamp } 2347ac27a0ecSDave Kleikamp 2348ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2349617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2350617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2351ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2352ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2353ac27a0ecSDave Kleikamp } 2354ac27a0ecSDave Kleikamp } 2355ac27a0ecSDave Kleikamp /* 2356dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2357ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2358ac27a0ecSDave Kleikamp */ 2359ac27a0ecSDave Kleikamp 23601d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 23611d1fe1eeSDavid Howells if (IS_ERR(root)) { 2362617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 23631d1fe1eeSDavid Howells ret = PTR_ERR(root); 2364ac27a0ecSDave Kleikamp goto failed_mount4; 2365ac27a0ecSDave Kleikamp } 2366ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 23671d1fe1eeSDavid Howells iput(root); 2368617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2369ac27a0ecSDave Kleikamp goto failed_mount4; 2370ac27a0ecSDave Kleikamp } 23711d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 23721d1fe1eeSDavid Howells if (!sb->s_root) { 23731d1fe1eeSDavid Howells printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); 23741d1fe1eeSDavid Howells iput(root); 23751d1fe1eeSDavid Howells ret = -ENOMEM; 23761d1fe1eeSDavid Howells goto failed_mount4; 23771d1fe1eeSDavid Howells } 2378ac27a0ecSDave Kleikamp 2379617ba13bSMingming Cao ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); 2380ef7f3835SKalpak Shah 2381ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2382ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2383ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2384ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2385ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2386ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2387ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2388ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2389ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2390ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2391ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2392ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2393ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2394ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2395ef7f3835SKalpak Shah } 2396ef7f3835SKalpak Shah } 2397ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2398ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2399ef7f3835SKalpak Shah sbi->s_inode_size) { 2400ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2401ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2402ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2403ef7f3835SKalpak Shah "available.\n"); 2404ef7f3835SKalpak Shah } 2405ef7f3835SKalpak Shah 2406ac27a0ecSDave Kleikamp /* 2407ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2408ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2409ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2410ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2411ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2412ac27a0ecSDave Kleikamp * superblock lock. 2413ac27a0ecSDave Kleikamp */ 2414617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2415617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2416617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 2417ac27a0ecSDave Kleikamp if (needs_recovery) 2418617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: recovery complete.\n"); 2419617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 2420617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", 2421617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": 2422617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": 2423ac27a0ecSDave Kleikamp "writeback"); 2424ac27a0ecSDave Kleikamp 2425a86c6181SAlex Tomas ext4_ext_init(sb); 2426c9de560dSAlex Tomas ext4_mb_init(sb, needs_recovery); 2427a86c6181SAlex Tomas 2428ac27a0ecSDave Kleikamp lock_kernel(); 2429ac27a0ecSDave Kleikamp return 0; 2430ac27a0ecSDave Kleikamp 2431617ba13bSMingming Cao cantfind_ext4: 2432ac27a0ecSDave Kleikamp if (!silent) 2433617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2434ac27a0ecSDave Kleikamp sb->s_id); 2435ac27a0ecSDave Kleikamp goto failed_mount; 2436ac27a0ecSDave Kleikamp 2437ac27a0ecSDave Kleikamp failed_mount4: 2438dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 243947b4a50bSJan Kara sbi->s_journal = NULL; 2440ac27a0ecSDave Kleikamp failed_mount3: 2441ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2442ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2443ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 2444ac27a0ecSDave Kleikamp failed_mount2: 2445ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2446ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2447ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2448ac27a0ecSDave Kleikamp failed_mount: 2449ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2450ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2451ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2452ac27a0ecSDave Kleikamp #endif 2453617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2454ac27a0ecSDave Kleikamp brelse(bh); 2455ac27a0ecSDave Kleikamp out_fail: 2456ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2457ac27a0ecSDave Kleikamp kfree(sbi); 2458ac27a0ecSDave Kleikamp lock_kernel(); 24591d1fe1eeSDavid Howells return ret; 2460ac27a0ecSDave Kleikamp } 2461ac27a0ecSDave Kleikamp 2462ac27a0ecSDave Kleikamp /* 2463ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2464ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2465ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2466ac27a0ecSDave Kleikamp */ 2467617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2468ac27a0ecSDave Kleikamp { 2469617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2470ac27a0ecSDave Kleikamp 2471ac27a0ecSDave Kleikamp if (sbi->s_commit_interval) 2472ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 2473617ba13bSMingming Cao /* We could also set up an ext4-specific default for the commit 2474ac27a0ecSDave Kleikamp * interval here, but for now we'll just fall back to the jbd 2475ac27a0ecSDave Kleikamp * default. */ 2476ac27a0ecSDave Kleikamp 2477ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2478ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2479dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2480ac27a0ecSDave Kleikamp else 2481dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 2482ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2483ac27a0ecSDave Kleikamp } 2484ac27a0ecSDave Kleikamp 2485617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2486ac27a0ecSDave Kleikamp unsigned int journal_inum) 2487ac27a0ecSDave Kleikamp { 2488ac27a0ecSDave Kleikamp struct inode *journal_inode; 2489ac27a0ecSDave Kleikamp journal_t *journal; 2490ac27a0ecSDave Kleikamp 2491ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2492ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2493ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2494ac27a0ecSDave Kleikamp 24951d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 24961d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2497617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2498ac27a0ecSDave Kleikamp return NULL; 2499ac27a0ecSDave Kleikamp } 2500ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2501ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2502ac27a0ecSDave Kleikamp iput(journal_inode); 2503617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2504ac27a0ecSDave Kleikamp return NULL; 2505ac27a0ecSDave Kleikamp } 2506ac27a0ecSDave Kleikamp 2507ac27a0ecSDave Kleikamp jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", 2508ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 25091d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2510617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2511ac27a0ecSDave Kleikamp iput(journal_inode); 2512ac27a0ecSDave Kleikamp return NULL; 2513ac27a0ecSDave Kleikamp } 2514ac27a0ecSDave Kleikamp 2515dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2516ac27a0ecSDave Kleikamp if (!journal) { 2517617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2518ac27a0ecSDave Kleikamp iput(journal_inode); 2519ac27a0ecSDave Kleikamp return NULL; 2520ac27a0ecSDave Kleikamp } 2521ac27a0ecSDave Kleikamp journal->j_private = sb; 2522617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2523ac27a0ecSDave Kleikamp return journal; 2524ac27a0ecSDave Kleikamp } 2525ac27a0ecSDave Kleikamp 2526617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2527ac27a0ecSDave Kleikamp dev_t j_dev) 2528ac27a0ecSDave Kleikamp { 2529ac27a0ecSDave Kleikamp struct buffer_head * bh; 2530ac27a0ecSDave Kleikamp journal_t *journal; 2531617ba13bSMingming Cao ext4_fsblk_t start; 2532617ba13bSMingming Cao ext4_fsblk_t len; 2533ac27a0ecSDave Kleikamp int hblock, blocksize; 2534617ba13bSMingming Cao ext4_fsblk_t sb_block; 2535ac27a0ecSDave Kleikamp unsigned long offset; 2536617ba13bSMingming Cao struct ext4_super_block * es; 2537ac27a0ecSDave Kleikamp struct block_device *bdev; 2538ac27a0ecSDave Kleikamp 2539617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2540ac27a0ecSDave Kleikamp if (bdev == NULL) 2541ac27a0ecSDave Kleikamp return NULL; 2542ac27a0ecSDave Kleikamp 2543ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2544ac27a0ecSDave Kleikamp printk(KERN_ERR 2545617ba13bSMingming Cao "EXT4: failed to claim external journal device.\n"); 2546ac27a0ecSDave Kleikamp blkdev_put(bdev); 2547ac27a0ecSDave Kleikamp return NULL; 2548ac27a0ecSDave Kleikamp } 2549ac27a0ecSDave Kleikamp 2550ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2551ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2552ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2553ac27a0ecSDave Kleikamp printk(KERN_ERR 2554617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2555ac27a0ecSDave Kleikamp goto out_bdev; 2556ac27a0ecSDave Kleikamp } 2557ac27a0ecSDave Kleikamp 2558617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2559617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2560ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2561ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2562617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2563ac27a0ecSDave Kleikamp "external journal\n"); 2564ac27a0ecSDave Kleikamp goto out_bdev; 2565ac27a0ecSDave Kleikamp } 2566ac27a0ecSDave Kleikamp 2567617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2568617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2569ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2570617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2571617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2572ac27a0ecSDave Kleikamp "bad superblock\n"); 2573ac27a0ecSDave Kleikamp brelse(bh); 2574ac27a0ecSDave Kleikamp goto out_bdev; 2575ac27a0ecSDave Kleikamp } 2576ac27a0ecSDave Kleikamp 2577617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2578617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2579ac27a0ecSDave Kleikamp brelse(bh); 2580ac27a0ecSDave Kleikamp goto out_bdev; 2581ac27a0ecSDave Kleikamp } 2582ac27a0ecSDave Kleikamp 2583bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2584ac27a0ecSDave Kleikamp start = sb_block + 1; 2585ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2586ac27a0ecSDave Kleikamp 2587dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2588ac27a0ecSDave Kleikamp start, len, blocksize); 2589ac27a0ecSDave Kleikamp if (!journal) { 2590617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2591ac27a0ecSDave Kleikamp goto out_bdev; 2592ac27a0ecSDave Kleikamp } 2593ac27a0ecSDave Kleikamp journal->j_private = sb; 2594ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2595ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2596ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2597617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2598ac27a0ecSDave Kleikamp goto out_journal; 2599ac27a0ecSDave Kleikamp } 2600ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2601617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2602ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2603ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2604ac27a0ecSDave Kleikamp goto out_journal; 2605ac27a0ecSDave Kleikamp } 2606617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2607617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2608ac27a0ecSDave Kleikamp return journal; 2609ac27a0ecSDave Kleikamp out_journal: 2610dab291afSMingming Cao jbd2_journal_destroy(journal); 2611ac27a0ecSDave Kleikamp out_bdev: 2612617ba13bSMingming Cao ext4_blkdev_put(bdev); 2613ac27a0ecSDave Kleikamp return NULL; 2614ac27a0ecSDave Kleikamp } 2615ac27a0ecSDave Kleikamp 2616617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2617617ba13bSMingming Cao struct ext4_super_block *es, 2618ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2619ac27a0ecSDave Kleikamp { 2620ac27a0ecSDave Kleikamp journal_t *journal; 2621ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2622ac27a0ecSDave Kleikamp dev_t journal_dev; 2623ac27a0ecSDave Kleikamp int err = 0; 2624ac27a0ecSDave Kleikamp int really_read_only; 2625ac27a0ecSDave Kleikamp 2626ac27a0ecSDave Kleikamp if (journal_devnum && 2627ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2628617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2629ac27a0ecSDave Kleikamp "numbers have changed\n"); 2630ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2631ac27a0ecSDave Kleikamp } else 2632ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2633ac27a0ecSDave Kleikamp 2634ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2635ac27a0ecSDave Kleikamp 2636ac27a0ecSDave Kleikamp /* 2637ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2638ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2639ac27a0ecSDave Kleikamp * can get read-write access to the device. 2640ac27a0ecSDave Kleikamp */ 2641ac27a0ecSDave Kleikamp 2642617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2643ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2644617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2645ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2646ac27a0ecSDave Kleikamp if (really_read_only) { 2647617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2648ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2649ac27a0ecSDave Kleikamp return -EROFS; 2650ac27a0ecSDave Kleikamp } 2651617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: write access will " 2652ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2653ac27a0ecSDave Kleikamp } 2654ac27a0ecSDave Kleikamp } 2655ac27a0ecSDave Kleikamp 2656ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2657617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2658ac27a0ecSDave Kleikamp "and inode journals!\n"); 2659ac27a0ecSDave Kleikamp return -EINVAL; 2660ac27a0ecSDave Kleikamp } 2661ac27a0ecSDave Kleikamp 2662ac27a0ecSDave Kleikamp if (journal_inum) { 2663617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2664ac27a0ecSDave Kleikamp return -EINVAL; 2665ac27a0ecSDave Kleikamp } else { 2666617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2667ac27a0ecSDave Kleikamp return -EINVAL; 2668ac27a0ecSDave Kleikamp } 2669ac27a0ecSDave Kleikamp 2670ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2671dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2672ac27a0ecSDave Kleikamp if (err) { 2673617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2674dab291afSMingming Cao jbd2_journal_destroy(journal); 2675ac27a0ecSDave Kleikamp return err; 2676ac27a0ecSDave Kleikamp } 2677ac27a0ecSDave Kleikamp } 2678ac27a0ecSDave Kleikamp 2679617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2680dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2681ac27a0ecSDave Kleikamp if (!err) 2682dab291afSMingming Cao err = jbd2_journal_load(journal); 2683ac27a0ecSDave Kleikamp 2684ac27a0ecSDave Kleikamp if (err) { 2685617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2686dab291afSMingming Cao jbd2_journal_destroy(journal); 2687ac27a0ecSDave Kleikamp return err; 2688ac27a0ecSDave Kleikamp } 2689ac27a0ecSDave Kleikamp 2690617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2691617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2692ac27a0ecSDave Kleikamp 2693ac27a0ecSDave Kleikamp if (journal_devnum && 2694ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2695ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2696ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2697ac27a0ecSDave Kleikamp 2698ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2699617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2700ac27a0ecSDave Kleikamp } 2701ac27a0ecSDave Kleikamp 2702ac27a0ecSDave Kleikamp return 0; 2703ac27a0ecSDave Kleikamp } 2704ac27a0ecSDave Kleikamp 2705617ba13bSMingming Cao static int ext4_create_journal(struct super_block * sb, 2706617ba13bSMingming Cao struct ext4_super_block * es, 2707ac27a0ecSDave Kleikamp unsigned int journal_inum) 2708ac27a0ecSDave Kleikamp { 2709ac27a0ecSDave Kleikamp journal_t *journal; 27106c675bd4SBorislav Petkov int err; 2711ac27a0ecSDave Kleikamp 2712ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2713617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " 2714ac27a0ecSDave Kleikamp "create journal.\n"); 2715ac27a0ecSDave Kleikamp return -EROFS; 2716ac27a0ecSDave Kleikamp } 2717ac27a0ecSDave Kleikamp 27186c675bd4SBorislav Petkov journal = ext4_get_journal(sb, journal_inum); 27196c675bd4SBorislav Petkov if (!journal) 2720ac27a0ecSDave Kleikamp return -EINVAL; 2721ac27a0ecSDave Kleikamp 2722617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", 2723ac27a0ecSDave Kleikamp journal_inum); 2724ac27a0ecSDave Kleikamp 27256c675bd4SBorislav Petkov err = jbd2_journal_create(journal); 27266c675bd4SBorislav Petkov if (err) { 2727617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error creating journal.\n"); 2728dab291afSMingming Cao jbd2_journal_destroy(journal); 2729ac27a0ecSDave Kleikamp return -EIO; 2730ac27a0ecSDave Kleikamp } 2731ac27a0ecSDave Kleikamp 2732617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2733ac27a0ecSDave Kleikamp 2734617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 2735617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2736617ba13bSMingming Cao EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); 2737ac27a0ecSDave Kleikamp 2738ac27a0ecSDave Kleikamp es->s_journal_inum = cpu_to_le32(journal_inum); 2739ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2740ac27a0ecSDave Kleikamp 2741ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2742617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2743ac27a0ecSDave Kleikamp 2744ac27a0ecSDave Kleikamp return 0; 2745ac27a0ecSDave Kleikamp } 2746ac27a0ecSDave Kleikamp 2747617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 2748617ba13bSMingming Cao struct ext4_super_block * es, 2749ac27a0ecSDave Kleikamp int sync) 2750ac27a0ecSDave Kleikamp { 2751617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2752ac27a0ecSDave Kleikamp 2753ac27a0ecSDave Kleikamp if (!sbh) 2754ac27a0ecSDave Kleikamp return; 2755ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2756bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); 2757617ba13bSMingming Cao es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 2758ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2759ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2760ac27a0ecSDave Kleikamp if (sync) 2761ac27a0ecSDave Kleikamp sync_dirty_buffer(sbh); 2762ac27a0ecSDave Kleikamp } 2763ac27a0ecSDave Kleikamp 2764ac27a0ecSDave Kleikamp 2765ac27a0ecSDave Kleikamp /* 2766ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2767ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2768ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2769ac27a0ecSDave Kleikamp */ 2770617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 2771617ba13bSMingming Cao struct ext4_super_block * es) 2772ac27a0ecSDave Kleikamp { 2773617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2774ac27a0ecSDave Kleikamp 2775dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2776dab291afSMingming Cao jbd2_journal_flush(journal); 277732c37730SJan Kara lock_super(sb); 2778617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2779ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2780617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2781ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2782617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2783ac27a0ecSDave Kleikamp } 278432c37730SJan Kara unlock_super(sb); 2785dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2786ac27a0ecSDave Kleikamp } 2787ac27a0ecSDave Kleikamp 2788ac27a0ecSDave Kleikamp /* 2789ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2790ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2791ac27a0ecSDave Kleikamp * main filesystem now. 2792ac27a0ecSDave Kleikamp */ 2793617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 2794617ba13bSMingming Cao struct ext4_super_block * es) 2795ac27a0ecSDave Kleikamp { 2796ac27a0ecSDave Kleikamp journal_t *journal; 2797ac27a0ecSDave Kleikamp int j_errno; 2798ac27a0ecSDave Kleikamp const char *errstr; 2799ac27a0ecSDave Kleikamp 2800617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2801ac27a0ecSDave Kleikamp 2802ac27a0ecSDave Kleikamp /* 2803ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2804617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2805ac27a0ecSDave Kleikamp */ 2806ac27a0ecSDave Kleikamp 2807dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2808ac27a0ecSDave Kleikamp if (j_errno) { 2809ac27a0ecSDave Kleikamp char nbuf[16]; 2810ac27a0ecSDave Kleikamp 2811617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 281246e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 2813ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 281446e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 2815ac27a0ecSDave Kleikamp "filesystem check."); 2816ac27a0ecSDave Kleikamp 2817617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2818617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2819617ba13bSMingming Cao ext4_commit_super (sb, es, 1); 2820ac27a0ecSDave Kleikamp 2821dab291afSMingming Cao jbd2_journal_clear_err(journal); 2822ac27a0ecSDave Kleikamp } 2823ac27a0ecSDave Kleikamp } 2824ac27a0ecSDave Kleikamp 2825ac27a0ecSDave Kleikamp /* 2826ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 2827ac27a0ecSDave Kleikamp * and wait on the commit. 2828ac27a0ecSDave Kleikamp */ 2829617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 2830ac27a0ecSDave Kleikamp { 2831ac27a0ecSDave Kleikamp journal_t *journal; 2832ac27a0ecSDave Kleikamp int ret; 2833ac27a0ecSDave Kleikamp 2834ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 2835ac27a0ecSDave Kleikamp return 0; 2836ac27a0ecSDave Kleikamp 2837617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2838ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2839617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 2840ac27a0ecSDave Kleikamp return ret; 2841ac27a0ecSDave Kleikamp } 2842ac27a0ecSDave Kleikamp 2843ac27a0ecSDave Kleikamp /* 2844617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 2845ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 2846ac27a0ecSDave Kleikamp * point. Just start an async writeback to get the buffers on their way 2847ac27a0ecSDave Kleikamp * to the disk. 2848ac27a0ecSDave Kleikamp * 2849ac27a0ecSDave Kleikamp * This implicitly triggers the writebehind on sync(). 2850ac27a0ecSDave Kleikamp */ 2851ac27a0ecSDave Kleikamp 2852617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb) 2853ac27a0ecSDave Kleikamp { 2854ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 2855ac27a0ecSDave Kleikamp BUG(); 2856ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2857ac27a0ecSDave Kleikamp } 2858ac27a0ecSDave Kleikamp 2859617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 2860ac27a0ecSDave Kleikamp { 2861ac27a0ecSDave Kleikamp tid_t target; 2862ac27a0ecSDave Kleikamp 2863ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2864dab291afSMingming Cao if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 2865ac27a0ecSDave Kleikamp if (wait) 2866dab291afSMingming Cao jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 2867ac27a0ecSDave Kleikamp } 2868ac27a0ecSDave Kleikamp return 0; 2869ac27a0ecSDave Kleikamp } 2870ac27a0ecSDave Kleikamp 2871ac27a0ecSDave Kleikamp /* 2872ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 2873ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 2874ac27a0ecSDave Kleikamp */ 2875617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb) 2876ac27a0ecSDave Kleikamp { 2877ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2878ac27a0ecSDave Kleikamp 2879ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2880617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2881ac27a0ecSDave Kleikamp 2882ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 2883dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2884dab291afSMingming Cao jbd2_journal_flush(journal); 2885ac27a0ecSDave Kleikamp 2886ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 2887617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2888617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2889ac27a0ecSDave Kleikamp } 2890ac27a0ecSDave Kleikamp } 2891ac27a0ecSDave Kleikamp 2892ac27a0ecSDave Kleikamp /* 2893ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 2894ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 2895ac27a0ecSDave Kleikamp */ 2896617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb) 2897ac27a0ecSDave Kleikamp { 2898ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2899ac27a0ecSDave Kleikamp lock_super(sb); 2900ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 2901617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2902617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2903ac27a0ecSDave Kleikamp unlock_super(sb); 2904dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 2905ac27a0ecSDave Kleikamp } 2906ac27a0ecSDave Kleikamp } 2907ac27a0ecSDave Kleikamp 2908617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data) 2909ac27a0ecSDave Kleikamp { 2910617ba13bSMingming Cao struct ext4_super_block * es; 2911617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2912617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 2913ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 2914617ba13bSMingming Cao struct ext4_mount_options old_opts; 2915ac27a0ecSDave Kleikamp int err; 2916ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2917ac27a0ecSDave Kleikamp int i; 2918ac27a0ecSDave Kleikamp #endif 2919ac27a0ecSDave Kleikamp 2920ac27a0ecSDave Kleikamp /* Store the original options */ 2921ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 2922ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 2923ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 2924ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 2925ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 2926ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2927ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 2928ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2929ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 2930ac27a0ecSDave Kleikamp #endif 2931ac27a0ecSDave Kleikamp 2932ac27a0ecSDave Kleikamp /* 2933ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 2934ac27a0ecSDave Kleikamp */ 2935ac27a0ecSDave Kleikamp if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { 2936ac27a0ecSDave Kleikamp err = -EINVAL; 2937ac27a0ecSDave Kleikamp goto restore_opts; 2938ac27a0ecSDave Kleikamp } 2939ac27a0ecSDave Kleikamp 2940617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 294146e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 2942ac27a0ecSDave Kleikamp 2943ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2944617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2945ac27a0ecSDave Kleikamp 2946ac27a0ecSDave Kleikamp es = sbi->s_es; 2947ac27a0ecSDave Kleikamp 2948617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 2949ac27a0ecSDave Kleikamp 2950ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 2951bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 2952617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 2953ac27a0ecSDave Kleikamp err = -EROFS; 2954ac27a0ecSDave Kleikamp goto restore_opts; 2955ac27a0ecSDave Kleikamp } 2956ac27a0ecSDave Kleikamp 2957ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 2958ac27a0ecSDave Kleikamp /* 2959ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 2960ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 2961ac27a0ecSDave Kleikamp */ 2962ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 2963ac27a0ecSDave Kleikamp 2964ac27a0ecSDave Kleikamp /* 2965ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 2966ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 2967ac27a0ecSDave Kleikamp * mark the partition as valid again. 2968ac27a0ecSDave Kleikamp */ 2969617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 2970617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 2971ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 2972ac27a0ecSDave Kleikamp 297332c37730SJan Kara /* 297432c37730SJan Kara * We have to unlock super so that we can wait for 297532c37730SJan Kara * transactions. 297632c37730SJan Kara */ 297732c37730SJan Kara unlock_super(sb); 2978617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 297932c37730SJan Kara lock_super(sb); 2980ac27a0ecSDave Kleikamp } else { 2981ac27a0ecSDave Kleikamp __le32 ret; 2982617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2983617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 2984617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2985ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 2986ac27a0ecSDave Kleikamp "optional features (%x).\n", 2987ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(ret)); 2988ac27a0ecSDave Kleikamp err = -EROFS; 2989ac27a0ecSDave Kleikamp goto restore_opts; 2990ac27a0ecSDave Kleikamp } 2991ead6596bSEric Sandeen 2992ead6596bSEric Sandeen /* 2993ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 2994ead6596bSEric Sandeen * around from a previously readonly bdev mount, 2995ead6596bSEric Sandeen * require a full umount/remount for now. 2996ead6596bSEric Sandeen */ 2997ead6596bSEric Sandeen if (es->s_last_orphan) { 2998ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2999ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3000ead6596bSEric Sandeen "orphan inode list. Please " 3001ead6596bSEric Sandeen "umount/remount instead.\n", 3002ead6596bSEric Sandeen sb->s_id); 3003ead6596bSEric Sandeen err = -EINVAL; 3004ead6596bSEric Sandeen goto restore_opts; 3005ead6596bSEric Sandeen } 3006ead6596bSEric Sandeen 3007ac27a0ecSDave Kleikamp /* 3008ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3009ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3010ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3011ac27a0ecSDave Kleikamp * the partition.) 3012ac27a0ecSDave Kleikamp */ 3013617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3014ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3015617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3016ac27a0ecSDave Kleikamp goto restore_opts; 3017617ba13bSMingming Cao if (!ext4_setup_super (sb, es, 0)) 3018ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3019ac27a0ecSDave Kleikamp } 3020ac27a0ecSDave Kleikamp } 3021ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3022ac27a0ecSDave Kleikamp /* Release old quota file names */ 3023ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3024ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3025ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3026ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3027ac27a0ecSDave Kleikamp #endif 3028ac27a0ecSDave Kleikamp return 0; 3029ac27a0ecSDave Kleikamp restore_opts: 3030ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3031ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3032ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3033ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3034ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 3035ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3036ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3037ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3038ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3039ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3040ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3041ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3042ac27a0ecSDave Kleikamp } 3043ac27a0ecSDave Kleikamp #endif 3044ac27a0ecSDave Kleikamp return err; 3045ac27a0ecSDave Kleikamp } 3046ac27a0ecSDave Kleikamp 3047617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) 3048ac27a0ecSDave Kleikamp { 3049ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3050617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3051617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3052960cc398SPekka Enberg u64 fsid; 3053ac27a0ecSDave Kleikamp 30545e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 30555e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 30566bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 3057fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 30585e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3059ac27a0ecSDave Kleikamp smp_rmb(); 3060ac27a0ecSDave Kleikamp 3061ac27a0ecSDave Kleikamp /* 30625e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 30635e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 30645e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3065ac27a0ecSDave Kleikamp */ 3066ac27a0ecSDave Kleikamp 3067ac27a0ecSDave Kleikamp /* 3068ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3069ac27a0ecSDave Kleikamp * overhead 3070ac27a0ecSDave Kleikamp */ 3071ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3072ac27a0ecSDave Kleikamp 3073ac27a0ecSDave Kleikamp /* 3074ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3075ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3076ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3077ac27a0ecSDave Kleikamp */ 3078ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3079617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3080617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3081ac27a0ecSDave Kleikamp cond_resched(); 3082ac27a0ecSDave Kleikamp } 3083ac27a0ecSDave Kleikamp 3084ac27a0ecSDave Kleikamp /* 3085ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3086ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3087ac27a0ecSDave Kleikamp */ 30885e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 30895e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 30905e70030dSBadari Pulavarty smp_wmb(); 30916bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3092ac27a0ecSDave Kleikamp } 3093ac27a0ecSDave Kleikamp 3094617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3095ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 30965e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 309752d9f3b4SPeter Zijlstra buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); 3098308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3099bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3100bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3101ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3102ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 310352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 31045e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3105617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3106960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3107960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3108960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3109960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 3110ac27a0ecSDave Kleikamp return 0; 3111ac27a0ecSDave Kleikamp } 3112ac27a0ecSDave Kleikamp 3113ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 3114ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 3115ac27a0ecSDave Kleikamp * Process 1 Process 2 3116617ba13bSMingming Cao * ext4_create() quota_sync() 3117dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3118ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 3119dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3120ac27a0ecSDave Kleikamp * 3121ac27a0ecSDave Kleikamp */ 3122ac27a0ecSDave Kleikamp 3123ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3124ac27a0ecSDave Kleikamp 3125ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3126ac27a0ecSDave Kleikamp { 3127ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3128ac27a0ecSDave Kleikamp } 3129ac27a0ecSDave Kleikamp 3130617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 3131ac27a0ecSDave Kleikamp { 3132ac27a0ecSDave Kleikamp handle_t *handle; 3133ac27a0ecSDave Kleikamp int ret, err; 3134ac27a0ecSDave Kleikamp 3135ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 3136617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 3137ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3138ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3139ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 3140617ba13bSMingming Cao err = ext4_journal_stop(handle); 3141ac27a0ecSDave Kleikamp if (!ret) 3142ac27a0ecSDave Kleikamp ret = err; 3143ac27a0ecSDave Kleikamp return ret; 3144ac27a0ecSDave Kleikamp } 3145ac27a0ecSDave Kleikamp 3146617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 3147ac27a0ecSDave Kleikamp { 3148ac27a0ecSDave Kleikamp handle_t *handle; 3149ac27a0ecSDave Kleikamp int ret, err; 3150ac27a0ecSDave Kleikamp 3151ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 3152617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 31532887df13SJan Kara if (IS_ERR(handle)) { 31542887df13SJan Kara /* 31552887df13SJan Kara * We call dquot_drop() anyway to at least release references 31562887df13SJan Kara * to quota structures so that umount does not hang. 31572887df13SJan Kara */ 31582887df13SJan Kara dquot_drop(inode); 3159ac27a0ecSDave Kleikamp return PTR_ERR(handle); 31602887df13SJan Kara } 3161ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 3162617ba13bSMingming Cao err = ext4_journal_stop(handle); 3163ac27a0ecSDave Kleikamp if (!ret) 3164ac27a0ecSDave Kleikamp ret = err; 3165ac27a0ecSDave Kleikamp return ret; 3166ac27a0ecSDave Kleikamp } 3167ac27a0ecSDave Kleikamp 3168617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3169ac27a0ecSDave Kleikamp { 3170ac27a0ecSDave Kleikamp int ret, err; 3171ac27a0ecSDave Kleikamp handle_t *handle; 3172ac27a0ecSDave Kleikamp struct inode *inode; 3173ac27a0ecSDave Kleikamp 3174ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3175617ba13bSMingming Cao handle = ext4_journal_start(inode, 3176617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3177ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3178ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3179ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3180617ba13bSMingming Cao err = ext4_journal_stop(handle); 3181ac27a0ecSDave Kleikamp if (!ret) 3182ac27a0ecSDave Kleikamp ret = err; 3183ac27a0ecSDave Kleikamp return ret; 3184ac27a0ecSDave Kleikamp } 3185ac27a0ecSDave Kleikamp 3186617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3187ac27a0ecSDave Kleikamp { 3188ac27a0ecSDave Kleikamp int ret, err; 3189ac27a0ecSDave Kleikamp handle_t *handle; 3190ac27a0ecSDave Kleikamp 3191617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3192617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3193ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3194ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3195ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3196617ba13bSMingming Cao err = ext4_journal_stop(handle); 3197ac27a0ecSDave Kleikamp if (!ret) 3198ac27a0ecSDave Kleikamp ret = err; 3199ac27a0ecSDave Kleikamp return ret; 3200ac27a0ecSDave Kleikamp } 3201ac27a0ecSDave Kleikamp 3202617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3203ac27a0ecSDave Kleikamp { 3204ac27a0ecSDave Kleikamp int ret, err; 3205ac27a0ecSDave Kleikamp handle_t *handle; 3206ac27a0ecSDave Kleikamp 3207617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3208617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 32099c3013e9SJan Kara if (IS_ERR(handle)) { 32109c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 32119c3013e9SJan Kara dquot_release(dquot); 3212ac27a0ecSDave Kleikamp return PTR_ERR(handle); 32139c3013e9SJan Kara } 3214ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3215617ba13bSMingming Cao err = ext4_journal_stop(handle); 3216ac27a0ecSDave Kleikamp if (!ret) 3217ac27a0ecSDave Kleikamp ret = err; 3218ac27a0ecSDave Kleikamp return ret; 3219ac27a0ecSDave Kleikamp } 3220ac27a0ecSDave Kleikamp 3221617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3222ac27a0ecSDave Kleikamp { 32232c8be6b2SJan Kara /* Are we journaling quotas? */ 3224617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3225617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3226ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3227617ba13bSMingming Cao return ext4_write_dquot(dquot); 3228ac27a0ecSDave Kleikamp } else { 3229ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3230ac27a0ecSDave Kleikamp } 3231ac27a0ecSDave Kleikamp } 3232ac27a0ecSDave Kleikamp 3233617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3234ac27a0ecSDave Kleikamp { 3235ac27a0ecSDave Kleikamp int ret, err; 3236ac27a0ecSDave Kleikamp handle_t *handle; 3237ac27a0ecSDave Kleikamp 3238ac27a0ecSDave Kleikamp /* Data block + inode block */ 3239617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3240ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3241ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3242ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3243617ba13bSMingming Cao err = ext4_journal_stop(handle); 3244ac27a0ecSDave Kleikamp if (!ret) 3245ac27a0ecSDave Kleikamp ret = err; 3246ac27a0ecSDave Kleikamp return ret; 3247ac27a0ecSDave Kleikamp } 3248ac27a0ecSDave Kleikamp 3249ac27a0ecSDave Kleikamp /* 3250ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3251ac27a0ecSDave Kleikamp * the quota file and such... 3252ac27a0ecSDave Kleikamp */ 3253617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3254ac27a0ecSDave Kleikamp { 3255617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3256617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3257ac27a0ecSDave Kleikamp } 3258ac27a0ecSDave Kleikamp 3259ac27a0ecSDave Kleikamp /* 3260ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3261ac27a0ecSDave Kleikamp */ 3262617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 32636f28e087SJan Kara char *path, int remount) 3264ac27a0ecSDave Kleikamp { 3265ac27a0ecSDave Kleikamp int err; 3266ac27a0ecSDave Kleikamp struct nameidata nd; 3267ac27a0ecSDave Kleikamp 3268ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3269ac27a0ecSDave Kleikamp return -EINVAL; 32700623543bSJan Kara /* When remounting, no checks are needed and in fact, path is NULL */ 32710623543bSJan Kara if (remount) 32726f28e087SJan Kara return vfs_quota_on(sb, type, format_id, path, remount); 32730623543bSJan Kara 3274ac27a0ecSDave Kleikamp err = path_lookup(path, LOOKUP_FOLLOW, &nd); 3275ac27a0ecSDave Kleikamp if (err) 3276ac27a0ecSDave Kleikamp return err; 32770623543bSJan Kara 3278ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 32794ac91378SJan Blunck if (nd.path.mnt->mnt_sb != sb) { 32801d957f9bSJan Blunck path_put(&nd.path); 3281ac27a0ecSDave Kleikamp return -EXDEV; 3282ac27a0ecSDave Kleikamp } 32830623543bSJan Kara /* Journaling quota? */ 32840623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 3285ac27a0ecSDave Kleikamp /* Quotafile not of fs root? */ 32864ac91378SJan Blunck if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode) 3287ac27a0ecSDave Kleikamp printk(KERN_WARNING 3288617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 32890623543bSJan Kara "Journaled quota will not work.\n"); 32900623543bSJan Kara } 32910623543bSJan Kara 32920623543bSJan Kara /* 32930623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 32940623543bSJan Kara * all updates to the file when we bypass pagecache... 32950623543bSJan Kara */ 32960623543bSJan Kara if (ext4_should_journal_data(nd.path.dentry->d_inode)) { 32970623543bSJan Kara /* 32980623543bSJan Kara * We don't need to lock updates but journal_flush() could 32990623543bSJan Kara * otherwise be livelocked... 33000623543bSJan Kara */ 33010623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 33020623543bSJan Kara jbd2_journal_flush(EXT4_SB(sb)->s_journal); 33030623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 33040623543bSJan Kara } 33050623543bSJan Kara 33061d957f9bSJan Blunck path_put(&nd.path); 33076f28e087SJan Kara return vfs_quota_on(sb, type, format_id, path, remount); 3308ac27a0ecSDave Kleikamp } 3309ac27a0ecSDave Kleikamp 3310ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3311ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3312ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3313ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3314617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3315ac27a0ecSDave Kleikamp size_t len, loff_t off) 3316ac27a0ecSDave Kleikamp { 3317ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3318725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3319ac27a0ecSDave Kleikamp int err = 0; 3320ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3321ac27a0ecSDave Kleikamp int tocopy; 3322ac27a0ecSDave Kleikamp size_t toread; 3323ac27a0ecSDave Kleikamp struct buffer_head *bh; 3324ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3325ac27a0ecSDave Kleikamp 3326ac27a0ecSDave Kleikamp if (off > i_size) 3327ac27a0ecSDave Kleikamp return 0; 3328ac27a0ecSDave Kleikamp if (off+len > i_size) 3329ac27a0ecSDave Kleikamp len = i_size-off; 3330ac27a0ecSDave Kleikamp toread = len; 3331ac27a0ecSDave Kleikamp while (toread > 0) { 3332ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3333ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3334617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3335ac27a0ecSDave Kleikamp if (err) 3336ac27a0ecSDave Kleikamp return err; 3337ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3338ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3339ac27a0ecSDave Kleikamp else 3340ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3341ac27a0ecSDave Kleikamp brelse(bh); 3342ac27a0ecSDave Kleikamp offset = 0; 3343ac27a0ecSDave Kleikamp toread -= tocopy; 3344ac27a0ecSDave Kleikamp data += tocopy; 3345ac27a0ecSDave Kleikamp blk++; 3346ac27a0ecSDave Kleikamp } 3347ac27a0ecSDave Kleikamp return len; 3348ac27a0ecSDave Kleikamp } 3349ac27a0ecSDave Kleikamp 3350ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3351ac27a0ecSDave Kleikamp * enough credits) */ 3352617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3353ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3354ac27a0ecSDave Kleikamp { 3355ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3356725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3357ac27a0ecSDave Kleikamp int err = 0; 3358ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3359ac27a0ecSDave Kleikamp int tocopy; 3360617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3361ac27a0ecSDave Kleikamp size_t towrite = len; 3362ac27a0ecSDave Kleikamp struct buffer_head *bh; 3363ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3364ac27a0ecSDave Kleikamp 33659c3013e9SJan Kara if (!handle) { 33669c3013e9SJan Kara printk(KERN_WARNING "EXT4-fs: Quota write (off=%Lu, len=%Lu)" 33679c3013e9SJan Kara " cancelled because transaction is not started.\n", 33689c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 33699c3013e9SJan Kara return -EIO; 33709c3013e9SJan Kara } 3371ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3372ac27a0ecSDave Kleikamp while (towrite > 0) { 3373ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3374ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3375617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3376ac27a0ecSDave Kleikamp if (!bh) 3377ac27a0ecSDave Kleikamp goto out; 3378ac27a0ecSDave Kleikamp if (journal_quota) { 3379617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3380ac27a0ecSDave Kleikamp if (err) { 3381ac27a0ecSDave Kleikamp brelse(bh); 3382ac27a0ecSDave Kleikamp goto out; 3383ac27a0ecSDave Kleikamp } 3384ac27a0ecSDave Kleikamp } 3385ac27a0ecSDave Kleikamp lock_buffer(bh); 3386ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3387ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3388ac27a0ecSDave Kleikamp unlock_buffer(bh); 3389ac27a0ecSDave Kleikamp if (journal_quota) 3390617ba13bSMingming Cao err = ext4_journal_dirty_metadata(handle, bh); 3391ac27a0ecSDave Kleikamp else { 3392ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3393678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3394ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3395ac27a0ecSDave Kleikamp } 3396ac27a0ecSDave Kleikamp brelse(bh); 3397ac27a0ecSDave Kleikamp if (err) 3398ac27a0ecSDave Kleikamp goto out; 3399ac27a0ecSDave Kleikamp offset = 0; 3400ac27a0ecSDave Kleikamp towrite -= tocopy; 3401ac27a0ecSDave Kleikamp data += tocopy; 3402ac27a0ecSDave Kleikamp blk++; 3403ac27a0ecSDave Kleikamp } 3404ac27a0ecSDave Kleikamp out: 34054d04e4fbSJan Kara if (len == towrite) { 34064d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3407ac27a0ecSDave Kleikamp return err; 34084d04e4fbSJan Kara } 3409ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3410ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3411617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3412ac27a0ecSDave Kleikamp } 3413ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3414617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3415ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3416ac27a0ecSDave Kleikamp return len - towrite; 3417ac27a0ecSDave Kleikamp } 3418ac27a0ecSDave Kleikamp 3419ac27a0ecSDave Kleikamp #endif 3420ac27a0ecSDave Kleikamp 3421617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3422ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3423ac27a0ecSDave Kleikamp { 3424617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3425ac27a0ecSDave Kleikamp } 3426ac27a0ecSDave Kleikamp 3427617ba13bSMingming Cao static struct file_system_type ext4dev_fs_type = { 3428ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 3429617ba13bSMingming Cao .name = "ext4dev", 3430617ba13bSMingming Cao .get_sb = ext4_get_sb, 3431ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3432ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3433ac27a0ecSDave Kleikamp }; 3434ac27a0ecSDave Kleikamp 3435617ba13bSMingming Cao static int __init init_ext4_fs(void) 3436ac27a0ecSDave Kleikamp { 3437c9de560dSAlex Tomas int err; 3438c9de560dSAlex Tomas 3439c9de560dSAlex Tomas err = init_ext4_mballoc(); 3440ac27a0ecSDave Kleikamp if (err) 3441ac27a0ecSDave Kleikamp return err; 3442c9de560dSAlex Tomas 3443c9de560dSAlex Tomas err = init_ext4_xattr(); 3444c9de560dSAlex Tomas if (err) 3445c9de560dSAlex Tomas goto out2; 3446ac27a0ecSDave Kleikamp err = init_inodecache(); 3447ac27a0ecSDave Kleikamp if (err) 3448ac27a0ecSDave Kleikamp goto out1; 3449617ba13bSMingming Cao err = register_filesystem(&ext4dev_fs_type); 3450ac27a0ecSDave Kleikamp if (err) 3451ac27a0ecSDave Kleikamp goto out; 3452ac27a0ecSDave Kleikamp return 0; 3453ac27a0ecSDave Kleikamp out: 3454ac27a0ecSDave Kleikamp destroy_inodecache(); 3455ac27a0ecSDave Kleikamp out1: 3456617ba13bSMingming Cao exit_ext4_xattr(); 3457c9de560dSAlex Tomas out2: 3458c9de560dSAlex Tomas exit_ext4_mballoc(); 3459ac27a0ecSDave Kleikamp return err; 3460ac27a0ecSDave Kleikamp } 3461ac27a0ecSDave Kleikamp 3462617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3463ac27a0ecSDave Kleikamp { 3464617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 3465ac27a0ecSDave Kleikamp destroy_inodecache(); 3466617ba13bSMingming Cao exit_ext4_xattr(); 3467c9de560dSAlex Tomas exit_ext4_mballoc(); 3468ac27a0ecSDave Kleikamp } 3469ac27a0ecSDave Kleikamp 3470ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 3471617ba13bSMingming Cao MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); 3472ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3473617ba13bSMingming Cao module_init(init_ext4_fs) 3474617ba13bSMingming Cao module_exit(exit_ext4_fs) 3475